It is believed that forest bathing strengthen the immune system.A. shouldB. mustC. needD.

发布时间：2020-08-16 21:05:41

It is believed that forest bathing      strengthen the immune system.
A. should
B. must
C. need
D. can

网友回答

A. should
B. must
C. need
(答案→)D. can
解析：考查情态动词。A应该；B必须；C需要；D能够，可能；句意：人们认为深林浴能加强免疫系统。
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