Look at these dark clouds! It ______________ (rain)有一下四个选项A.will be raining B. is going to rain C.rains D. is to rain

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Look at these dark clouds! It ______________ (rain)有一下四个选项A.will be raining B. is going to rain C.rains           D. is to rain

Look at these dark clouds! It ______________ (rain)有一下四个选项A.will be raining B. is going to rain C.rains D. is to rain
Look at these dark clouds! It ______________ (rain)
有一下四个选项
A.will be raining B. is going to rain
C.rains D. is to rain

Look at these dark clouds! It ______________ (rain)有一下四个选项A.will be raining B. is going to rain C.rains D. is to rain
选:B.is going to rain
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.
不过楼主 问题的关键在于 区分be going to与will的区别
1.be going to 表示近期、眼下就要发生的事情,will 表示的将来时间则较远一些,如:He is going to write a letter tonight.
He will write a book one day.
2.be going to 表示根据主观判断将来肯定发生的事情,
will表示客观上将来势必发生的事情.
He is seriously ill.He is going to die.
He will be twenty years old.
3.be going to 含有“计划,准备”的意思,而 will 则没有这个意思,如:
She is going to lend us her book.
He will be here in half an hour.
因此我认为 如果作者 就目前马上发生的一件事情说 它不容易的话 用
it's not going to be easy.
或者 如果 是主观 断定要 不容易 时 ,
严格意义上讲 这时候都不能和 will 替代.
但是 在现在口语书面语言在互相交织的今天,从不严格的语法角度 ,二者互换 也是可以接受的.