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题型：单选题题类：难易度：普通

（典中点）人教版（PEP）六年级上册英语期末提优专训语音与词汇

I need a helmet. In the USA people on bikes must wear ____.

A、a B、an C、one

举一反三

There is in the room. It's empty(空的).

Is there in the book?

Power is off and ________ can watch TV.

{#blank#}1{#/blank#} (Anything/Something) else?

We should do _______ carefully.

选择合适的单词填空，补全句子或对话。

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