﹣The plane won't take off ______ the thick clouds move away．（ ）
﹣﹣Let's wait patiently for the announcement from the airport．
A．sinceB．thoughC．whileD．until
﹣The plane won't take off ______ the thick clouds move away．（ ）
﹣﹣Let's wait patiently for the announcement from the airport．
A．sinceB．thoughC．whileD．until
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