题目内容
While in college, he was often seen ________ part-time work in restaurants at the weekends.
[ ]
A.
practising
B.
to be practising
C.
practise
D.
to practise
答案:D
解析:
解析:
|
此句为被动语态,且是经常性动作,所以用不定式to practise作主语补足语。 |
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