单项选择题
—Has Tom finished his homework yet?
—I have no idea;he（）it this morning.
A.did
B.had been doing
C.had done
D.was doing
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单项选择题
The party was（）great success.We sang and danced until it came to（）end at midnight.
A.the；an
B.a；the
C.a；an
D./；a
