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问题: Tom will spend as much time as he can_______after the young trees.

A.looking B.look C.to look D.looked
Why not choose C ?

解答:

Tom will spend as much time as he can_______after the young trees.
A.looking B.look C.to look D.looked
答案选A。
这道题可以变形为:
Tom will spend time (in)+doing sth.
spend .....(in)+doing;
spend.......on+sth.
花费时间做某事,后面接动词要用动名词;
花费时间在什么事上,后面接名词要加on再加名词。