If you spit at all, please spit in the bucket(痰孟里)providedA. mustB. shallC. should D. may

发布时间：2020-08-17 02:18:17

If you     spit at all, please spit in the bucket(痰孟里)provided
A. must
B. shall
C. should
D. may

网友回答

(答案→)A. must
B. shall
C. should
D. may
解析：must 表必须，一定；shall表法律，条文规定的必须；should 应该；may可能，结合句意：如果你一定要吐痰，请吐在所给的痰盂里。故选A.
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