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题型：单选题题类：模拟题难易度：普通

I am looking after little Tom today. He's been in my house _ 8:00 this morning.

A、at B、since C、for D、till

举一反三

Have you ever played jokes _____ others _____April Fool's Day?

We go to school at 7:00 __________ the morning.

Li Ming got a letter {#blank#}1{#/blank#} the post office. (填介词)

I often regard Mr. Smith _____________ my best friend.

Jane felt afraid when she went{#blank#}1{#/blank#}(穿过)the bridge alone at night.

Friends can exercise together {#blank#}1{#/blank#}a fitness center.

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