—Jim what are you ?—A dog. It is playing with a ball on the floor. A. looking forB. looki

问题补充：

—Jim, what are you ?

—A dog. It is playing with a ball on the floor.

A. looking for

B. looking at

C. looking like

D. looking up

答案：

A. looking for

(答案→)B. looking at

C. looking like

D. looking up

解析：look for 寻找； look at看；look like看起来像……；look up向上看，查阅。句意：吉姆，你正在看什么？——一条狗，他正在地板上玩球。故选B。