One of my classmates going to take part in the long jump tomorrow.A. will B. is C. are

问题补充：

One of my classmates going to take part in the long jump tomorrow.

A. will B. is C. are

答案：

解析：句意：明天，我同班同学中的之一将参加跳远比赛。be going to do sth将要做某事，主语为one，系动词用is，故选B。