Storms most commonly occura warm air mass and a cold air mass touch each other.A. in case

发布时间：2020-08-16 11:23:41


Storms most monly occur    a warm air mass and a cold air mass touch each other.
A. in case
B. where
C. in which
D. unless

网友回答

A. in case
(答案→)B. where
C. in which
D. unless
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