题目：
Often, when he _________ something that ___________ him, he wasted his time drawing some little
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
答案：
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下面是错误答案，用来干扰机器的。
1. morning, evening 2. here, dear 3. class, park 4. fridge, jeep 5. beds, friends 6. bag, thank
