问题
选择题
— Has Tom finished his homework yet?
— I have no idea, he _____ it this morning.
A．was doing
B．did
C．had done
D．would do
答案
答案：A
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— Has Tom finished his homework yet?
— I have no idea, he _____ it this morning.
A．was doing
B．did
C．had done
D．would do
答案：A