问题补充:
单选题Often,whenhe______somethingthat______him,hewastedhistimedrawingsomelittlepictures.A.should be doing; gaveB.should have been doing; was givenC.should do; was givenD.should have been doing; had given
答案:
B解析根据第二空先行词something 和定语从句谓语动词give之间为被动关系,故排除A、D。句意:他经常是在本应该做那些分配给他的工作的时候,把时间浪费在画画上。题干中的时间住处为过去时,故应为本应该做某事,排除C项。