I shall never beat John at tennis; we are clearly not in the same .A. setB. bandC. groupD.

问题补充：

I shall never beat John at tennis; we are clearly not in the same .

A. set

B. band

C. group

D. class

答案：

A. set

B. band

C. group

(答案→)D. class

解析：be in the same class 水平相同。此句中class,意为“(高低、优劣的)等级；种类”。