The wet weather will continue tomorrow when a cold front to arrive.
A. is expected
B. is expecting
C. expects
D. will be expected
网友回答
(答案→)A. is expected
B. is expecting
C. expects
D. will be expected
解析：
a cold front(冷锋)和expect之间是被动关系，主句是一般将来时，故when引导的时间状语从句应该用一般现在时的被动语态表示将来要被发生的动作。