Mr. Su’s robot has caught a virus. He’s complaining the shop the robot.A. about aboutB.

问题补充：

Mr. Su’s robot has caught a virus. He’s complaining the shop the robot.

A. about, about

B. about, to

C. to, to

D. to, about

答案：

A. about, about

B. about, to

C. to, to

(答案→)D. to, about

解析：

试题分析: 句意：苏先生的机器人中病毒了。他正在向商店投诉机器人。complain about 投诉某事物，complainto向……投诉，故选D。