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题型：单选题题类：真题难易度：普通

_____ the students came from different countries, they got along quite well in the summer camp.

A、While B、Unless C、Since D、Until

举一反三

We will never give in {#blank#}1{#/blank#} they do or say about our plan.

Lessons can be learned to face the future, ________ history cannot be changed.

She was a stubborn girl. ________, I couldn't persuade her to change her mind.

The engineers are so busy that they have zero time for outdoor sports activities, ________ they have the interest.

His friends ignored his advice, ________ they knew it to be helpful.

________ some people think advertisements bring much convenience, others are cautious about the tricks advertisements play on them.

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