题目内容
-Has Tom finished his homework?
-I don’t know.But he _________ it the whole morning.
[ ]
A.
did
B.
have done
C.
was doing
D.
will do
答案:C
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题目内容
-Has Tom finished his homework?
-I don’t know.But he _________ it the whole morning.
did
have done
was doing
will do