Only when class began _______that he had left his book at home.A．will he realiz
题型：不详难度：来源：
Only when class began _______that he had left his book at home.| A．will he realize | B．he did realize | | C．did he realize | D．should he realize |
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答案
| C |
解析
| "only+状语"放于句首，应构成倒装句，主语前要加助动词，由时态看为一般过去时。 |
举一反三
_______he is, he seldom shows his precious coins to others.| A．Coin-collector as | B．As a coin-collector | | C．A coin-collector as | D．Coin-collector that |
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They waited and waited. _____ they had been looking forward to.| A．Then the hour came | B．The hour then came | | C．Then came the hour | D．Then did the hour come |
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Not until Mr. Smith came to China ______what kind of a country she is from.| A．Didn’t he know | B．Had he known | | C．Hadn’t he known | D．Did he know |
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So badly ______ in the accident that he was sent to a hospital.| A．did he hurt | B．he was hurt | C．was he hurt | D．be did hurt |
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_______ about the universe up till now.| A．So little had me known | B．Only a little do we know | | C．Very little have we known | D．Little shall we know |
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