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- 3would you please ___me a pen?Atake B bring C know D let
- 4一个物体做自由落体运动,1s后在释放一个物体.两者之间的距离
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- 7改写为反义疑问句； Aren't English idioms interesting?
- 8How often does your sister A.watching TV B.surfs the Internet C.go to the movies D.exercise
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- 104x的立方-（x-2)(3x+1）-2（x-1）（2x的平方-5x+1）