— Has Sam finished his homework today? — I have no idea. He ________ it this morning.
A.
did
B.
was doing
C.
has done
D.
had done
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参考答案:
举一反三
【简答题】A.He doesnt know Sally is in class this year. B.He doesnt want to be the class treasurer. C.He cant believe he was nominated. D.He has no intention of looking for treasure.