Don’t lose heart. It won’t be long you catch up with others.A. sinceB. untilC. asD. befor

问题补充：

Don’t lose heart. It won’t be long you catch up with others.

A. since

B. until

C. as

D. before

答案：

A. since

B. until

C. as

(答案→)D. before

解析：考查时间状语从句的连接词。句意“不要灰心。你不久就会赶上其他人。”A“自从”；B“直到”；C“当”；D“在......之前”。It won’t be long before...是固定句型。故选D。

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