Ks5u2010高考二轮复习英语考案
专题十一 状语从句
【专题考案】1. We are watching TV ______ we caught sight of a friend of ours .
A. as soon as B. while C. when D. once
2.The price of diamond rings has risen sharply _______ the price of gold rings has gone down.
A. when B. as C. while D. otherwise
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