It’s quite normal to ten percent of the cost of a building for a period of six months or so, in case faults are found in it.
| A．keep up | B． keep away | C．keep off | D．keep back |
相关试题
.(辽宁卷26). Doctors say that exercise is important for health, but it _______ be regular exercise.
| A．can | B．will | C．must | D．may |
. I_______ have watched that movie —it’ll give me horrible dreams.
| A．shouldn’t | B．needn’t | C．couldn’t | D．mustn’t |
(陕西卷23). ----May I take this book out of the reading room?
----No, you . You read it in here.
| A．mightn`t | B．won’t | C．need’t | D．mustn`t |
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