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题型：单选题题类：常考题难易度：普通

2017届北京朝阳区高三上期中考试英语试卷

Don't call me at the office ________ it is necessary.

A、before B、unless C、although D、till

举一反三

If our marketing plan succeeds, we _______ the sales by thirty percent next year.

She says that she'll have to close the shop ________ business improves.

If you can do these things by the time you ________ college, you'll do well in the test of college life.

______ I know the money is safe, I shall not worry about it.

—What bad weather! I'm afraid the trip will be canceled.

—____it would clear up tomorrow.

—Let's go fishing if it ________ this weekend.

—Good idea.

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