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题型：单选题题类：常考题难易度：普通

江苏省盐城市盐都区西片2017届九年级下学期英语开学学情检测试卷

The scientists will succeed in their experiment______ they give up.

A、unless B、if C、after D、until

举一反三

—I want to know if Mr. Green ______here tomorrow.

—If he _______, I'll tell you.

— Excuse me, could you please tell me if the sports meeting ________ on time?

— Hard to say. If it ________ tomorrow, we'll have to put it off.

If our government ______ attention to controlling food safety now, our health ______ in danger.

______there is no buying, there will be no killing.

If you a good idea, you keep it to yourself.

If it{#blank#}1{#/blank#}(not rain) tomorrow, we will have a picnic in the park.

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