--Do you know when the Chinese custom_________ from?

     --It's hard to say. But its characteristics__________ the Tang Period.

     A. began ; prove                 B. started ; show

     C. is ; appear                   D. dates ; suggest

--Do you know when the Chinese custom_________ from?

     --It's hard to say. But its characteristics__________ the Tang Period.

A. began; prove                 B. started; show

C. is; appear                   D. dates; suggest

--Do you know when the Chinese custom_________ from?

--It's hard to say. But its characteristics__________ the Tang Period.

A. began ; prove                 B. started ; show

C. is ; appear                   D. dates ; suggest

--Do you know when the Chinese custom_________ from?

--It's hard to say. But its characteristics__________ the Tang Period.

A. began ; prove                 B. started ; show

C. is ; appear                   D. dates ; suggest

--Do you know when the Chinese custom_________ from?

--It's hard to say. But its characteristics__________ the Tang Period.

A. began ; prove　　　　　　　 B. started ; show

C. is ; appear　　　　　　　　　 D. dates ; suggest