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
B
根據(jù)第二空先行詞something 和定語(yǔ)從句謂語(yǔ)動(dòng)詞give之間為被動(dòng)關(guān)系，故排除A、D。句意：他經(jīng)常是在本應(yīng)該做那些分配給他的工作的時(shí)候，把時(shí)間浪費(fèi)在畫畫上。題干中的時(shí)間住處為過去時(shí)，故應(yīng)為本應(yīng)該做某事，排除C項(xiàng)。
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