when the storm comes,all window_____A.ought to be closingB.ought to closingC.ought to be closedD.ought to closed选那个?为什麼?求个明白.

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when the storm comes,all window_____
A.ought to be closing
B.ought to closing
C.ought to be closed
D.ought to closed
选那个?为什麼?
求个明白.

C.
When the storm comes,all window ought to be closed.
全句的意思是 当暴风雨来临的时候,所有的窗户都应当被关闭.
be closed = 被关闭

选C
ought to=应该,后面跟动词原形,被关上=be closed

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