John his students is playing basketball on the playground.A. as wellB. as well asC. andD.

问题补充：

John his students is playing basketball on the playground.

A. as well

B. as well as

C. and

D. together

答案：

A. as well

(答案→)B. as well as

C. and

D. together

解析：考查主谓一致。as well as 连接两个主语时谓语动词用单数形式，句意：不仅他的学生们而且他正在操场上打篮球。所以选B。