Question

【题目】Learning to write is learning to think. You don't know things clearly ______ you can write them down.

A.unlessB.if

C.sinceD.whether

Answer 1

【答案】A

【解析】

句意：学习写作就是学习思考。除非你能把事情写下来，否则你不会清楚地知道。

考查连词辨析。unless除非，相当于if not，表条件；if如果，表条件；since自从，表时间；whether是否，表疑问。本句是条件状语从句，根据“You don't know things clearly你不会清楚地知道”，可知unless符合句意，故选A。