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單項(xiàng)選擇題

On（）side of the street there are some trees.

A.both
B.either
C.every
D.all

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單項(xiàng)選擇題

Of all the students in our class, Betty writes（）

A.very carefully
B.most carefully
C.more carefully
D.the most carefully

單項(xiàng)選擇題

Not until the meeting was over（）that he had made a mistake in his speech.

A.he realized
B.did he realize
C.hehas realized
D.has he realized