Playing computer games for a long time is a _____ of time.

A. kill B. use C. cost D. waste

D 【解析】句意:玩電腦游戲很長(zhǎng)時(shí)間是浪費(fèi)時(shí)間。A. kill殺死;B. use 使用;C. cost花費(fèi);D. waste浪費(fèi)。a waste of time浪費(fèi)時(shí)間,結(jié)合句意,故答案為D。
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