单项选择题

Not until Columbus discovered America（）to Europe.

A. bananas were brought
B. bananas brought
C. are bananas brought
D. were bananas brought

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Not until （） his shoes did he enter one of the low -ceilinged rooms of the Japanese house.

A. did he remove
B. he had removed
C. had he removed
D. he removed
单项选择题
My friends arrived suddenly with nowhere to stay so I put them （） for the night.

A. up
B. in
C. out
D. down
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