八上一道英语题,说明为什么We saw a strange cloud__the sky.A.move cross B.moving across C.move across D moving crossing

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八上一道英语题,说明为什么Wesawastrangecloud__thesky.A.movecrossB.movingacrossC.moveacrossDmovingcrossing八上一道英语题,

八上一道英语题,说明为什么We saw a strange cloud__the sky.A.move cross B.moving across C.move across D moving crossing
八上一道英语题,说明为什么
We saw a strange cloud__the sky.
A.move cross B.moving across C.move across D moving crossing

八上一道英语题,说明为什么We saw a strange cloud__the sky.A.move cross B.moving across C.move across D moving crossing
答案应该是:A
首先,排除B和D,不可以是moving,语法错误,用moving是正在进行,那moving前面应该有be动词,题目中没有,所以是错误的.
然后就是cross和across的选择了,cross是介词,across是动词,显然接在动词move后边的应该是介词cross,就好像walk through,walk后边接的是介词through