According to the air traffic rules, youswitch off your mobile phone before bearding.A. may

发布时间：2020-08-15 00:43:38

According to the air traffic rules, you    switch off your mobile phone before bearding.
A. may
B. can
C. would
D. should

网友回答

A. may
B. can
C. would
(答案→)D. should
解析：此题考查情态动词的用法。根据句意“按照空中交通规则，你应当在登机前关掉你的手机”，所以只有should(应该，应当)符合题意。
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