It must be morning now,for birds are singing.句中的for能不能换成because?为什么?

10.It _______(be) snowy this morning.You must wear more clothes. It must be morning now,for birds are singing.句中的for能不能换成because?为什么? It Must Be?歌词 it must be Since the road is wet this morning,---------last night.A it must rain B it must have rainde C it must be raining D it must have been raining 选什么 为什么 Since the road is wet this morning,---------last night.A it must rain B it must have rainde C it must be raining D it must have been raining 11. Sincestthe road is wet this morning,last night()选择谢谢A it must be raining B it must rain C it must have rained D it must have been rained it must be morning,____ the birds are singinga.becauseb.asc.sinced.for请简述四者区别 It Must Be Love 歌词 It must be some catch. It must be him 歌词 it must be _____(interest) it must be rainy( )( )(随后) it must be imagination 歌词 It must be very happy. It must be something like it. yo must be here at six tomorrow morning. 最近见过一个海报,是关于Every morning in Africa,a Gazelle wakes up.It knows it must run faster than the fastest lion or it will be killed.Every morning a Lion wakes up.It knows it must outrun the slowest Gazelle or it will starve to death..