The windows must _________ before you leave the room.| A．be closed | B．are closed | C．close | D．be close |
|
| A |
| 考察时态。句意：在你离开房间之前，不许关上窗户。结合语境可知本句主语为动作对象，故用被动语态。选A。 |
核心考点
试题【The windows must _________ before you leave the room.A．be closed B．are closedC．c】；主要考察你对
动词的被动语态等知识点的理解。
[详细]举一反三
when you want to talk to your teacher ,you should _ _first.| A．called to her | B．called up her | | C．call her up | D．called her up | The river smells terrible. People_______ dirty things into it .| A．must stop to throw | | B．must stop from throwing | | C．must be stopped to throw | | D．must be stopped from throwing |
| In order to make Chongqing more beautiful, lots of trees _____ on both sides of the street.| A．should build | B．have built | C．must be built | D．will build |
| The world has a big headache and it _______ by money. It began in America last year.| A．cause | B．causes | C．is caused | D．are caused |
| Our classroom _____ every day, so it’s very clean.
A. cleans B. is cleaned C is cleaning. D. cleaned |
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