-Must I do the project on my own?

-No, you____.You can work with your classmates.

A. needn’t B. can’t C. shouldn’t D. mustn’t

A 【解析】句意：——我必须自己做这个项目吗？——不，你不需要。你可以和你的同学一起工作。A. needn’t不必；B. can’t 不能；C. shouldn’t不应该；D. mustn’t禁止，千万别。以must开头的一般疑问句，以must开头的疑问句，肯定回答用must，而否定回答则用needn’t或don’t have to，意为“不需要、不必”，而不能用mustn’t，故选A。

Michael_________in a school in Yunnan from February to June next year.

A. teach B. taught C. will teach D. was teaching

C 【解析】句意：米迦勒将于明年二月至六月在云南的一所学校任教。根据时间状语next year判断，句子的时态为一般将来时态，故答案为C。

Mr Black walked around and offered help____we were doing an experiment.

A. while B. although C. until D. unless

A 【解析】句意：布莱克先生在我们做实验的时候在我们身边走来走去提供帮助。A. while正当……时候；B. although尽管；C. until到……为止；D. unless除非，如果不。while与进行时态连用，故答案为A。

Old Mr. Green doesn't feel_____because some students visit him regularly.

A. sadly B. gently C. lonely D. angrily

C 【解析】句意：格林老先生不感到孤独，因为一些学生定期来看他。A. sadly悲伤地；B. gently温柔地；C. lonely孤单地；D. angrily生气地。根据后面的句子“because some students visit him regularly.”可知，因为有学生而不再感到孤单，故答案为C。

The film Operation Red Sea_____a lot of praise since its first show months ago.

A. wins B. win C. will win D. has won

D 【解析】句意：红海影业自几个月前首次演出以来，赢得了很多好评。since its first show months ago是表示到目前为止的时间段，用在现在完成时态的句子中。故答案为D。

Mr. Zhou is good at cooking and he has decided______his own restaurant.

A. open B. opened C. to open D. opening

C 【解析】句意：周先生擅长烹饪，他决定开一家属于自己的餐馆。decide to do sth.决定去做某事，固定搭配。故答案为C。

The debate on whether to keep pets_____forty minutes yesterday afternoon.

A. last B. lasted C. will last D. has lasted

B 【解析】句意：关于是否养宠物的争论昨天下午持续了四十分钟。根据 yesterday afternoon 可知此处时态应为一般过去时。故答案为B。

Sue practises______the violin hard and often gives wonderful performances.

A. play B. played C. to play D. playing

D 【解析】句意：苏练习小提琴很刻苦，经常会有一些精彩的表演。practice doing sth.练习做某事。故答案为D。

The self-diving plane proves to be useful in many ways.___smart invention it is!

A. What B. What a C. What an D. How

B 【解析】句意：自潜水飞机在很多方面都有用途。多么聪明的发明啊！感叹句一般有两种结构：What +(a/an)+形容词+名词+主语+谓语！名词是复数或不可数名词，不加a/an。How+形容词+主语+谓语！本句的中心词invention为可数名词单数形式，应该用what来引导，smart以辅音音素开头，前面应该用不定冠词a，故答案为B。

（题文）Please______the rubbish into different litter bins according to the signs.

A. puts B. put C. putting D. to put

B 【解析】 句意：请根据标志牌将垃圾放入不同的垃圾箱中。祈使句以动词原形开头，故答案为B。