We ______ for quite a long time.a、were keeping waitedb、were kept waitedc、were keeping waitingd、were kept waiting
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We ______ for quite a long time.a、were keeping waitedb、were kept waitedc、were keeping waitingd、were kept waiting
We ______ for quite a long time.
a、were keeping waited
b、were kept waited
c、were keeping waiting
d、were kept waiting
We ______ for quite a long time.a、were keeping waitedb、were kept waitedc、were keeping waitingd、were kept waiting
D 被要求等 keep doing sth
c、were keeping waiting
keep doing sth
或者be kept to do sth
所以选C
d
d be kept doing