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。

The Smiths walked for a while{#blank#}1{#/blank#} {#blank#}2{#/blank#}

{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#}, I just don't want to go there.

I called you at seven yesterday, but you didn't {#blank#}1{#/blank#} {#blank#}2{#/blank#}.

{#blank#}1{#/blank#}is very important before doing sports.