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9. Not until the motorbike looked almost new________repairing and cleaning it.
A.he stopped
B.did he stop
C.stopped he
D.he did stop
欣瑞专家解析：句意为：他把摩托车擦洗和修补得像新的一样才停止下来。not until引导的状语(或状语从句)放在句首，主句部分需部分倒装，所以只有B符合题意。
【答案】 B
10.Little________that we were watching his every move，so he seemed to be going his own way in this business.
A.he realized
B.he didn’t realize
C.didn’t he realize
D.did he realize
欣瑞专家解析：本题考查倒装结构。否定词little位于句首时句子要部分倒装。
【答案】 D
11.Not until he called the secretary three times________that the manager went to an important meeting.
A.did he tell
B.he told
C.was he told
D.he was told
欣瑞专家解析：否定词not置于句首时，句子要用部分倒装，加之he与tell为动宾关系，故主句应用被动语态;所以选C。
【答案】 C
12. Only under special circumstances________to take makeup tests.
A.are freshmen permitted
B.permitted are freshmen
C.freshmen are permitted
D.are permitted freshmen
欣瑞专家解析：only后面跟状语位于句首时，句子要部分倒装，故答案为A。
【答案】 A
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