look at these black clouds--there ___ be a heavy raina) is going tob) will

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lookattheseblackclouds--there___beaheavyraina)isgoingtob)willlookattheseblackclouds--there___beaheav

look at these black clouds--there ___ be a heavy raina) is going tob) will
look at these black clouds--there ___ be a heavy rain
a) is going to
b) will

look at these black clouds--there ___ be a heavy raina) is going tob) will
选a,有clouds,表示下雨这个事情正在going中了
表示将来的有is going to, is to , is about to, 和will 四个
如果这几个都是备选,一般不选will

b

答案选B will

选a, is going to
注意:表示“有某种迹象要发生某事”,只能用be going to ,本题根据“these black clouds(乌云密布)”来判断。

a
表示天气将会变化时多用be going to 的结构
WILL一般表临时的动作