You'd better give it up it is too late, or you'll gel into trouble.A.sinceB.befo
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You'd better give it up ______ it is too late, or you'll gel into trouble.
A.since
B.before
C.so that
D.once
试题答案
B
before 引导时间状语从句，本意是“在……之前”，此处应理解为“以免”。