.They ______ be at home. You see, the door is locked from the outside.
| A．can’t | B．may | C． must | D． mustn’t |
相关试题
To all the famous artists’ surprise．the unknown woman’s two ______paintings are also on show in the art exhibition．
A．little  blue oil |
B．blue little oil | C．oil blue little | D．little oil，blue |
Don’ t be joking. It’ s time to______your business.
| A．set out | B．take up | C．go on | D．get down |
Jim went to answer the phone. _____, Harry started to prepare lunch.
| A．However | B．Nevertheless | C．Besides | D．Meanwhile |
When ______questions in class，one should answer them as clearly as possible．
| A．asking | B．to ask | C．to be asked | D．asked |
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