He will spend six hours at his desk he finishes his composition.A.beforeB.untilC
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He will spend six hours at his desk ______ he finishes his composition.
A.before
B.until
C.after
D.when
试题答案
A
考查时间状语从句的连接词。句意“在完成作文之前，他将花6个小时的时间坐在椅子上。”until常与not连用；before“在......之前”。故选A。