题目内容
Li Lei ________ getting ready for tomorrow's travel.
[ ]
A.can be busy
B.must be busily
C.must be busy
D.can be busily
答案:C
提示:
提示:
|
表示推测时can用在否定句或疑问句中,而must用在肯定句中。句型be busy doing sth. |
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