一道英语练习题.The research subject that the professor had finished

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一道英语练习题.
The research subject that the professor had finished last week _____him and his assistants more than two years.
A.cost B.wasted.C.spend D.took

took
考点：
sth take sb some time
sb spend sth on sth/in doing sth.
再问：为什么不能用cost?
再答： costexpendspendtakepay这些动词均含“花费”之意。cost:
指花费时间、金钱、劳力等。其主语是物，而不能由人充当，也不用被动形式。expend:
较正式用词，通常指为某一专门目的而花费大量金钱、时间或精力。spend:
普通用词，与cost基本同义，但主语必须是人。take:
普通用词，指需要占用空间、时间或精力等，其主语可以是人，也可以是一件事情。pay:
“付款、给……报酬”，它可作及物动词也可作不及物动词。pay常用于以下几种句型：①Sb．pay（s）sb．money意为“某人付款给另一个人或某人给另一个人多少报酬”。He pays me fifty yuan a week．他每周给我五十元的报酬。②pay for sth．意为“付……款、给……报酬”。He has paid for the meal．他已付了那顿饭的钱。③pay money for sth．意为“花多少钱买某物”。My father paid 40 pounds for the desk．我父亲花了40英磅买了这张书桌。来自海词

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