—I’m tired because I studied until midnight last night.

—Why not go to sleep ________ this evening?

A. late B. later C. early D. earlier

D 【解析】句意：——我累了，因为我昨晚学习到深夜。——今晚为什么不早点睡觉呢？考查比较级辨析题。根据句意语境，可知是this evening和last night进行比较；go to sleep上床睡觉，动词短语需用副词修饰；应该用副词比较级，可排除AC选项。而later不合句意，故选D。

—I ________ you at seven and you didn’t pick up.

—I was taking a shower at that time.

A. call B. called C. am calling D. have called

B 【解析】句意：——我七点钟打电话给你，你没接。——那时我正在洗澡。考查动词时态辨析题。and连接并列结构，at seven在七点钟，是过去的时间，需用一般过去时，可排除ACD三项。根据句意语境，可知选B。

I often help mum ________ the housework because I think it’s good for me.

A. with B. in C. on D. of

A 【解析】句意：我经常帮助妈妈做家务，因为我认为这对我有好处。考查介词辨析题。help sb. with sth.帮助某人做某事，固定短语。根据句意语境，可知选A。

—Have you decided what you would like to make for our party?

—Yes, a delicious cake. In fact, I ________ making it.

A. finish B. am finishing C. finished D. have finished

D 【解析】句意：——你决定为我们的聚会做什么了吗？——是的，（做）一个美味的蛋糕。事实上，我已经完成了。考查动词时态辨析题。in fact事实上；根据句意语境，可知用现在完成时，故选D。

—________ books did you sell last Sunday?

—About 100.

A. How many B. How much C. How heavy D. How long

A 【解析】句意：——上星期日你卖了多少本书？——大约100本。考查疑问词辨析题。A. How many多少，问数量；B. How much多少，问价格/数量；C. How heavy多重，问重量；D. How long多长，问长度或时间。根据答语About 100.，可知问的是数量，可排除CD选项。AB都可以问数量，但how much后接不可数名词，books是复数名词，故选A。 ...

Scott has just got a new job. He ________ at a radio station next week.

A. works B. worked C. will work D. is working

C 【解析】句意：史葛刚刚找到一份新工作。下周他将在一个广播电台工作。考查动词时态辨析题。next week下个星期，用于一般将来时，可排除ABD三个选项。根据句意语境，可知选C。

The stories in this book may be old, _________ they’re still interesting.

A. so B. and C. or D. but

D 【解析】句意：这本书的故事可能很古老，但它们仍然很有趣。考查连词辨析题。A. so所以，表因果；B. and和，表并列；C. or或者，表选择；D. but但是，表转折。根据句意语境，可知本句前后是转折关系，故选D。

—I’m going to town. Would you like to join me?

—Sorry, I ________. I still have lots of homework to do.

A. can B. can’t C. must D. needn’t

B 【解析】句意：——我要进城去。你愿意和我一起去吗？——对不起，我不能。我还有很多作业要做。考查情态动词辨析题。A. can能够/可以，表示允许；B. can’t不能，表示拒绝；C. must必须，一定；D. needn’t不必，指没必要。根据下文I still have lots of homework to do.，可知是否定回答，故选B。

The plants must________ every three days, or they will fail to grow.

A. water B. watering C. be watered D. watered

C 【解析】句意：这些植物必须每三天浇一次水，否则它们就不能生长。考查被动语态。must一定，情态动词后接原形动词。plants是动词water（浇水）的受动者，需用被动语态，即“be+过去分词”结构。根据句意结构和语境，可知选C。

—Could you tell me ________ back from her hometown?

—Yes. She’ll be back this Sunday.

A. when Alice came B. when did Alice come

C. when Alice will come D. when will Alice come

C 【解析】句意：——你能告诉我爱丽丝什么时候从家乡回来吗？——是的。她这个星期日回来。考查宾语从句。宾语从句，需用陈述句语序，BD是疑问语序，可排除。根据答语She’ll be back this Sunday.，结合句意语境，可知用一般将来时，故选C。