问题补充：
There a class meeting tomorrow afternoon.
A. is going to have
B. is going to be
C. is having
D. is going to having
答案：
A. is going to have
(答案→)B. is going to be
C. is having
D. is going to having
解析：句意：明天下午，这将要举行一个班会。明天计划做的事用be going to ,there be 句型与其作法为there be going to be.故选B
