when spring comes,the weather gets warmer and warmer,and the days gets longer

when spring comes,the weather gets warmer and warmer,and the days gets longer
________,the weather gets warmer and warmer,and the days gets longer.
a.While spring is coming b.When spring comes
c.When spring will come d.Beore spring comes
选B,其他错在哪?
英语人气:184 ℃时间:2019-08-21 21:26:42
优质解答
当春天来了后,天气就变的越来越暖活了,白天也变长了.
C.D不符合题意.而A中的while只能接连续性动词.
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