If you smoke in the room, please keep the windows open.A. shouldB. mayC. shallD. must

发布时间：2020-08-17 03:36:48

If you      smoke in the room, please keep the windows open.
A. should
B. may
C. shall
D. must

网友回答

A. should
B. may
C. shall
(答案→)D. must
解析：考查情态动词：A. should应该B. may 可以C. shall将，会，可以，D. must必须，偏要，句意：如果你偏要抽烟，请把窗户打开。选D。
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