It's very important _______ us ______ every day.

题型：单选题题类：常考题难易度：普通

A、for;exercise B、to;to exercise C、for;to exercise D、to;exercise

举一反三

keep sb./sth. ＋形容词使某人/某物保持…… 如：

We should {#blank#}1{#/blank#}.我们应该保持我们的城市干净。

keep sb doing sth. 使某人一直做某事

Don't {#blank#}2{#/blank#}.别让我等得太久。

—Oh, it will begin in ten minutes. Hurry up!

—Of course. I love children.

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