Not until you told me what had happened, ________. [ ]A. didn’t I know

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Not until you told me what had happened, ________.       [     ]
A. didn’t I know anything about it
B. I knew nothing about it
C. did I know anything about it
D. had not I known anything about it

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举一反三

Only when _______ in 1941, _______ to get back to his research again. [ ]

A. was the war over; was he able
B. the war was over; did he able
C. was the over; he was able
D. the war was over; was he able

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My mother suggested that not only ______ study hard myself but also _____help my sister. [ ]

A. I should; I should
B. should I; should I
C. should I; I should
D. I should; should I

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In no case ________ what you have done for us and at no time ______ your kindness. . [ ]

A. I shall forget; I will forget
B. shall I forget; shall I forget
C. shall I forget; I shall forget
D. forget I shall; forget I shall

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Only when people have enough to eat and plenty to wear ______ to talk about environmental
protection. [     ]
A. it makes sense
B. does it make sense
C. that it makes sense
D. do they make sense

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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

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