选择题：Its not easy to change habits, ______ with strong will and self-control, it is p

题目内容：

It's not easy to change habits, ______ with strong will and self-control, it is possible.

A.for

B.or

C.but

D.so

参考答案：

答案解析：

We still know little about the Moon _____ men have landed on it.

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—How time flies! The middle school life is coming to an end.—Yes. We have to say goodbye, ________ o

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甲乙丙三人参加 2022 年冬奥会北京、延庆、张家口三个赛区志愿服务活动，若每人只能选择一个赛区，且选择其中任何一个赛区是等可能的．记 X 为三人选中的赛区个数， Y为三人没有选中的赛区个数

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It took them about five hours to________ the fire. Although the house was destroyed, nobody was hurt

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