All of you yourself and we’ll begin our class soon.A. are seatingB. will seatC. have seat

问题补充：

All of you,yourself, and we’ll begin our class soon.

A. are seating

B. will seat

C. have seated

D. seat

答案：

A. are seating

B. will seat

C. have seated

(答案→)D. seat

解析：句意：所有人都请坐，我们将开始上课了。本句中为祈使句，祈使句用动词的原形开头，为了强调说话的对象，可以将祈使句的主语说出来更为明确，故选D