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單項(xiàng)選擇題

Not until most of the people had left the airport（）his sister was there.

A.that he saw
B.had he seen
C.did he see
D.that he had seen

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單項(xiàng)選擇題

Not always（）they want (to)

A.people can do what
B.can people do what
C.people can not do what
D.can‘t people do what

單項(xiàng)選擇題

--We want to sit at the table near the window. -- I‘m sorry, but（）already.

A.it took
B.it takes
C.it is being taken
D.it has been taken