－He asked Tom, “Have you finished your homework？”

－He asked Tom 　　　　.

A．if had he finished his homework.

B．whether he had finished his homework

C．if he had finished your homework.

D．if you had finished your homework.

（）广告主要指商品处于成长期与成熟期的广告。

A.竞争性

B.宣传性

C.维持性

D.开拓性