—The plane won't take off ______ the thick clouds move away. —Let's wait patiently for the announcement from the airpo

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1. (2019·临沂模拟) —The plane won't take off ______ the thick clouds move away.
—Let's wait patiently for the announcement from the airport.

A . since B . though C . while D . until

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山东省临沂市2019届中考英语押题卷（一）