题目内容
Often, when he _________ something that ___________ him, he wasted his time drawing some little
pictures.
pictures.
[ ]
A. should be doing; gave
B. should have been doing; was given
C. should do; was given
D. should have been doing; had given
B. should have been doing; was given
C. should do; was given
D. should have been doing; had given
B
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