Question

Learning to write is learning to think. You don’t know things clearly _________ you can write
them down.

A．unless

B．if

C．since

D．whether

Answer 1

A

試題分析：句意：學習寫作就是學習思考。你不能清楚地知道事情除非你可以把他們寫下來。Unless除非；if如果； since從；whether是否。所以選A。