用方框中的單詞或短語的正確形式完成句子。

　　The 1．________ theories of Isaac Newton(1642-1727)have the course of modern science．Some of Newton’s most important theories 2．________ force and motion．In science, the word “force”3．________ the cause that makes objects move in a 4．________ way．“Motion” stands for the movement of an object．

　　5．________ a ball is lying on the floor．As it lies on the floor, the ball isn’t moving．It is “at rest”．Will that ball suddenly begin to move? No, it won’t．But suppose you were to 6．________ the ball across the floor．Then the ball would move．You would be 7．________ the force needed to put the ball into motion．This 8．________ is an example of the first part of Newton’s first law of motion．Newton 9．________ that every object tends to remain 10．________ unless it is acted upon by a force．

答案：
解析：

1．scientific　2．deal with　3．stands for　4．certain　5．Suppose　6．push　7．supplying　8．situation　9．proposed　10．a(chǎn)t rest


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