摘要：答案：B。解析：unless意为“除非”，相当于if...not，“You won't pass the exam unless you study hard.”意思是“除非你努力学习，否则你不会通过考试”。

中考英语学霸必做条件状语从句选择填空专练及参考答案解析：

1. We will go on a picnic tomorrow ________ it doesn't rain.

A. if B. when C. while D. until

2. You won't pass the exam ________ you study hard.

A. if B. unless C. when D. while

3. ________ he comes, we won't be able to go.

A. If B. Unless C. When D. As

4. I will call you ________ I get the ticket.

A. if B. unless C. as soon as D. until

5. We'll go swimming ________ the weather is fine tomorrow.

6. You can't learn English well ________ you don't work hard.

A. if B. unless C. when D. because

7. ________ it rains, we'll stay at home.

8. I'll come to see you ________ I have time.

9. He will go to the park ________ it is sunny tomorrow.

10. We won't go to the zoo ________ it is cold tomorrow.

11. ________ you don't hurry, you'll be late for school.

A. If B. Unless C. When D. While

12. I'll help you ________ you need me.

13. ________ it snows, we'll make a snowman.

14. You'll miss the train ________ you don't run.

15. I'll go to the library ________ I finish my homework.

16. We'll have a party ________ it is Saturday tomorrow.

17. You won't succeed ________ you try your best.

18. ________ it is windy, we won't fly a kite.

19. I'll give the book to him ________ I see him.

20. We'll go to the beach ________ the weather is good.

21. You can't watch TV ________ you finish your homework.

22. ________ it is hot tomorrow, we'll go swimming.

23. I'll tell him the news ________ he comes back.

24. We won't go out ________ it stops raining.

A. if B. unless C. when D. until

25. ________ you work hard, you'll get good grades.

26. I'll buy a new dress ________ I have enough money.

27. ________ it is cloudy, we may not go to the park.

28. You'll be healthy ________ you eat more vegetables.

29. ________ it rains heavily, we'll stay at home.

30. I'll go to the concert ________ I get the ticket.

31. We'll have a good time ________ we go to the party.

32. You won't be able to pass the test ________ you study.

33. ________ it is cold, we'll wear warm clothes.

34. I'll write to you ________ I arrive in Beijing.

35. We'll go on a trip ________ the weather is nice.

36. You can't go to the party ________ you are invited.

37. ________ it is sunny, we'll have a picnic.

38. I'll call you ________ I need your help.

39. We won't leave ________ it is time.

40. ________ you practice more, you'll improve your English.

答案及解析

1. 答案：A。解析：句意为“如果明天不下雨，我们将去野餐”，if表示“如果”，引导条件状语从句，符合句意。

2. 答案：B。解析：unless意为“除非”，相当于if...not，“You won't pass the exam unless you study hard.”意思是“除非你努力学习，否则你不会通过考试”。

3. 答案：B。解析：“Unless he comes, we won't be able to go.”意为“除非他来，否则我们不能去”，unless引导条件状语从句，表示否定的条件。

4. 答案：A。解析：“I will call you if I get the ticket.”表示“如果我买到票，我会给你打电话”，if引导条件状语从句，说明打电话的条件是买到票。

5. 答案：A。解析：“We'll go swimming if the weather is fine tomorrow.”意思是“如果明天天气好，我们就去游泳”，if引导条件状语从句，强调天气好是去游泳的条件。

6. 答案：A。解析：“You can't learn English well if you don't work hard.”表示“如果你不努力学习，你就不能学好英语”，if引导条件状语从句，说明努力学习是学好英语的条件。

7. 答案：A。解析：“If it rains, we'll stay at home.”意为“如果下雨，我们就待在家里”，if引导条件状语从句，下雨是待在家里的条件。

8. 答案：A。解析：“I'll come to see you if I have time.”表示“如果我有时间，我会来看你”，if引导条件状语从句，有时间是来看你的条件。

9. 答案：A。解析：“He will go to the park if it is sunny tomorrow.”意思是“如果明天天气晴朗，他将去公园”，if引导条件状语从句，天气晴朗是去公园的条件。

10. 答案：A。解析：“We won't go to the zoo if it is cold tomorrow.”表示“如果明天气温低，我们就不去动物园”，if引导条件状语从句，说明气温低是不去动物园的条件。

11. 答案：A。解析：“If you don't hurry, you'll be late for school.”意为“如果你不快点，你上学就会迟到”，if引导条件状语从句，不快点是迟到的条件。

12. 答案：A。解析：“I'll help you if you need me.”表示“如果你需要我，我会帮助你”，if引导条件状语从句，需要我是我帮助你的条件。

13. 答案：A。解析：“If it snows, we'll make a snowman.”意思是“如果下雪，我们就堆雪人”，if引导条件状语从句，下雪是堆雪人的条件。

14. 答案：A。解析：“You'll miss the train if you don't run.”表示“如果你不跑，你就会错过火车”，if引导条件状语从句，不跑是错过火车的条件。

15. 答案：C。解析：“I'll go to the library as soon as I finish my homework.”意为“我一完成作业就去图书馆”，as soon as引导时间状语从句，强调完成作业和去图书馆的时间紧密相连。

16. 答案：A。解析：“We'll have a party if it is Saturday tomorrow.”表示“如果明天是星期六，我们就举办派对”，if引导条件状语从句，明天是星期六是举办派对的条件。

17. 答案：B。解析：“You won't succeed unless you try your best.”意思是“除非你尽力，否则你不会成功”，unless引导条件状语从句，强调尽力是成功的必要条件。

18. 答案：A。解析：“If it is windy, we won't fly a kite.”意为“如果刮风，我们就不放风筝”，if引导条件状语从句，刮风是不放风筝的条件。

19. 答案：C。解析：“I'll give the book to him as soon as I see him.”表示“我一见到他就把书给他”，as soon as引导时间状语从句，强调见到他和给他书的时间先后顺序。

20. 答案：A。解析：“We'll go to the beach if the weather is good.”意思是“如果天气好，我们就去海滩”，if引导条件状语从句，天气好是去海滩的条件。

21. 答案：B。解析：“You can't watch TV unless you finish your homework.”意为“除非你完成作业，否则你不能看电视”，unless引导条件状语从句，完成作业是看电视的条件。

22. 答案：A。解析：“If it is hot tomorrow, we'll go swimming.”表示“如果明天天气热，我们就去游泳”，if引导条件状语从句，天气热是去游泳的条件。

23. 答案：C。解析：“I'll tell him the news as soon as he comes back.”意思是“他一回来我就告诉他这个消息”，as soon as引导时间状语从句，强调他回来和我告诉他消息的时间紧密相连。

24. 答案：B。解析：“We won't go out unless it stops raining.”表示“除非雨停了，否则我们不会出去”，unless引导条件状语从句，雨停是出去的条件。

25. 答案：A。解析：“If you work hard, you'll get good grades.”意为“如果你努力学习，你就会取得好成绩”，if引导条件状语从句，努力学习是取得好成绩的条件。

26. 答案：A。解析：“I'll buy a new dress if I have enough money.”表示“如果我有足够的钱，我就买一条新裙子”，if引导条件状语从句，有足够的钱是买新裙子的条件。

27. 答案：A。解析：“If it is cloudy, we may not go to the park.”意思是“如果天气多云，我们可能不去公园”，if引导条件状语从句，天气多云是不去公园的条件。

28. 答案：A。解析：“You'll be healthy if you eat more vegetables.”意为“如果你多吃蔬菜，你就会健康”，if引导条件状语从句，多吃蔬菜是健康的条件。

29. 答案：A。解析：“If it rains heavily, we'll stay at home.”表示“如果雨下得很大，我们就待在家里”，if引导条件状语从句，雨下得大是待在家里的条件。

30. 答案：A。解析：“I'll go to the concert if I get the ticket.”意思是“如果我买到票，我就去听音乐会”，if引导条件状语从句，买到票是去听音乐会的条件。

31. 答案：A。解析：“We'll have a good time if we go to the party.”意为“如果我们去参加派对，我们会玩得很开心”，if引导条件状语从句，去参加派对是玩得开心的条件。

32. 答案：B。解析：“You won't be able to pass the test unless you study.”表示“除非你学习，否则你无法通过考试”，unless引导条件状语从句，学习是通过考试的条件。

33. 答案：A。解析：“If it is cold, we'll wear warm clothes.”意思是“如果天气冷，我们就穿暖和的衣服”，if引导条件状语从句，天气冷是穿暖和衣服的条件。

34. 答案：C。解析：“I'll write to you as soon as I arrive in Beijing.”意为“我一到北京就给你写信”，as soon as引导时间状语从句，强调到达北京和写信的时间先后顺序。

35. 答案：A。解析：“We'll go on a trip if the weather is nice.”表示“如果天气好，我们就去旅行”，if引导条件状语从句，天气好是去旅行的条件。

36. 答案：B。解析：“You can't go to the party unless you are invited.”意思是“除非你被邀请，否则你不能去参加派对”，unless引导条件状语从句，被邀请是去参加派对的条件。

37. 答案：A。解析：“If it is sunny, we'll have a picnic.”意为“如果天气晴朗，我们就去野餐”，if引导条件状语从句，天气晴朗是去野餐的条件。

38. 答案：A。解析：“I'll call you if I need your help.”表示“如果我需要你的帮助，我会给你打电话”，if引导条件状语从句，需要你的帮助是打电话的条件。

39. 答案：B。解析：“We won't leave unless it is time.”意思是“除非到时间了，否则我们不会离开”，unless引导条件状语从句，到时间是离开的条件。

40. 答案：A。解析：“If you practice more, you'll improve your English.”意为“如果你多练习，你就会提高你的英语水平”，if引导条件状语从句，多练习是提高英语水平的条件。

来源：蒙古元素