Once you want to do something, you must get down _____it well. ( )A．doB．do_刷题宝

题干

Once you want to do something, you must get down _____it well. ( )

A．do	B．doing
C．to do	D． to doing

上一题下一题 0.85难度单项选择更新时间:2014-02-24 05:53:29

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