Tom together with her good friends in the playground.They playing basketball.A. is are B.

问题补充：

Tom together with her good friends in the playground.They playing basketball.

A. is,are

B. are,is

C. is,is

D. are,are

答案：

(答案→)A. is,are

B. are,is

C. is,is

D. are,are

解析：句意：汤姆和他的好朋友在操场，他们正在打篮球。第一分句主语是汤姆，介词短语 together with her good friends起修饰作用，所以是第三人称单数作主语；第二分句主语是复数，根据be动词的用法可知应选A。