题目内容
It has been accepted that all the students ____ put on masks before going to school in case they are infected with flu virus.
| A．shall | B．will |
| C．need | D．may |
A
解析试题分析： 考查情态动词。句意：学生们应在去学校之前带上口罩以防感染禽流感，这已经被广泛的接受。Shall用于第二、第三人称，表示说话人给对方命令、警告、允诺或威胁，故选A项。
考点 : 考查情态动词
名校课堂系列答案The country has already sent up three unmanned spacecraft, the most recent__at the end of last March.
| A．has been launched | B．having been launched |
| C．being launched | D．to be launched |
We left the small town, _ clearly _ no need to stay．
| A．it; was | B．it; being | C．there; was | D．there; being |
With the electricity ___________, all the machines stopped.
| A．cut off | B．was cut off | C．cut down | D．was cut down |
Though his teachers were quite satisfied with his performance, he thought he ____ better if he had tried harder.
| A．could have done | B．should have done |
| C．ought to have done | D．must have done |
—I saw Nancy on the way home yesterday.
—It be her. She’s gone to the USA for further study.
| A．mustn’t | B．can’t |
| C．won’t | D．needn’t |
— I’ve prepared all kinds of food for the picnic.
—Do you mean we_____ bring anything with us?
| A．can’t | B．mustn’t | C．shan’t | D．needn't |
I told Sally how to get here, but perhaps I ______for her.
| A．had to write it out | B．must have written it out |
| C．should have written it out | D．ought to write it out |
When I passed this afternoon, I saw a little boy was lying on the grass, his hands _____ under his head.
| A．having crossed | B．crossing | C．crossed | D．to cross |