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题型：单选题题类：常考题难易度：普通

内蒙古赤峰二中2018-2019学年高一上学期英语第二次月考试卷

The game is not very difficult _______ you understand the rules.

A、until B、though C、once D、unless

举一反三

Magic shows are entertaining ______ the audience does not discover how the tricks are done.

Some developing countries will feel the economic squeeze and fail to focus on long-term development to end poverty, _______ heavy debts remain.

I'll be out for some time. ________ anything important happens, call me up immediately.

They haven't solved the problem yet ._____she had listened to what he said!

I'll lend you the money only on you can pay on time.

Please don't call me at the office ________ it's really necessary.

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