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问题

Mr. Wang decided to devote all his time_______ his spoken English before going abroad.

A:improve
B:to improve
C:improving
D:to improving
正确答案是:
同类题型

I wonder why they’re so late. They ______ herean hour ago.

ompany wants to reduce prices to increase its market share, and this is _______ we differ from it.

This is ______ my pen. I’m writing with _____ pen.

Tony, don’t play with that knife. You hurt yourself.—I won’t, dad.

What time did you get there thismorning— _________ eight

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