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题型：单选题题类：常考题难易度：普通

北京市东城区2018届高三上学期英语期末考试试卷

______ we want to get to Chicago by sunset, it means having to leave at dawn tomorrow.

A、If B、After C、While D、Where

举一反三

You won't find paper cutting difficult _____you keep practicing it.

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

You won't find paper cutting difficult _____you keep practicing it.

_____the damage is done, it will take many years for the farmland to recover.

You can't avoid your job tomorrow you work hard today.

_________ we don't stop climate change, many animals and plants in the world will be gone.

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