21．—Hello, Mary! Have you finished your homework?

—Oh, not yet. It ______ in half an hour.

A. will finish

B. is finished

C. is going to finish

D. will be finished

【答案】 D

【解析】【分析】句意：---嗨，玛丽，你完成作业了吗？---哦，还没有。我半个小时后就完成。in+时间段，表示“多长时间以后”，用一般将来时。主语it指上文的homework，与finish之间构成被动关系be+过去分词，所以此处是一般将来时的被动语态，故答案为D。【点评】考查动词的时态和语态，注意语境中的时间状语是判断时态的关键，确定主语和动词的关系可以确定动词的语态。

22．We're leaving tomorrow. We ______come back _________ next Friday.

A. will, from

B. won't, in

C. will. on

D. won't, until

【答案】D

【解析】【分析】题意：我们要走了，直到下周五才回来。根据题意，应用not… until. 且用一般将来时，故选D。

23．—There ________ a basketball game in our school tomorrow. —Great!

A. is going to have

B. will be

C. be

D. will have

【答案】 B

【解析】【分析】句意:一明天我们学校将有一场足球赛。一太好了!时间是tomorrow所以本句时态为一般将来时态，本句考查there be句型的一般将来时态，有两种形式，一种为there is /are giong tobe.一种为threr will be.所以只有B选项符合题意。故选B。

24．You good grades if you hard.

A. won't get; won't study

B. won't get; don't study

C. don't get; don't study

D. don't get; won't study

【答案】 B

【解析】【分析】句意：如果你不努力学习，你就不会取得好成绩。主句用一般将时，从句用一般现在时代替。故选B。

【点评】此题考查主从句的时态问题，平时应多归纳总结各种时态，语态和句式的结构及用法。

25．—My aunt me to Europe for vacation next month. —Have a good time!

A. take

B. took

C. will take