The children to go sightseeing tomorrow.A. is goingB. are goingC. am goingD. go

问题补充：

The children to go sightseeing tomorrow.

A. is going

B. are going

C. am going

D. go

答案：

A. is going

(答案→)B. are going

C. am going

D. go

解析：句意：明天孩子们将去观光旅行。根据时间副词tomorrow.可知此处用一般将来时，故排除D项。主语是The children名词复数，故谓语用are going。故选B。