will be与is going to have,was going to be的区别

题目

will be与is going to have,was going to be的区别
或者解说一下为什么填A
There ___an English film next week.
A.will be B.is going to have
C.may be D.was going to be
C选项不说了,其他的说说

答案

该句讲的是将来的事情,所以首先要用将来时态,排除D项!B项is going to have是错误的表达方式,所以不选!A项will be可以表达的是将来会发生的某件客观的事实,符合题意,故为正确选项!