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题型：单选题题类：真题难易度：普通

Animals are our good friends. We are supposed ________ them.

A、to protect B、protect C、protecting D、protected

举一反三

It's very kind _______ you ________ me with my English.

Seeing their teacher walking into the classroom, the students stopped_______at once.

What's the d{#blank#}1{#/blank#} between Chinese and English?

We should be {#blank#}1{#/blank#}(thank) to those who helped us.

However, our actions make many kinds of animals in danger, and we treat m {#blank#}1{#/blank#}of animals badly

我不敢在海里游泳。

I'm {#blank#}1{#/blank#} swim in the sea.

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