Be careful when the homework.A.doingB.doC.you doingD.you did
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Be careful when________ the homework.
A.doing
B.do
C.you doing
D.you did
试题答案
A
when/while doing sth. ,sb. …此句型中。前后主语一致。
Be careful when________ the homework.
A.doing
B.do
C.you doing
D.you did
A
when/while doing sth. ,sb. …此句型中。前后主语一致。