--Do you know when the Chinese custom from?It's hard to say. But its characteristics th

问题补充：

--Do you know when the Chinese custom from?

--Its hard to say. But its characteristics the Tang Period.

A. began; prove

B. started; show

C. dates; suggest

D. is; appear

答案：

A. began; prove

B. started; show

(答案→)C. dates; suggest

D. is; appear

解析：考查动词短语和动词辨析。date from追溯到；prove证明；show显示；suggest暗示，表明；appear出现。句意：--你知道中国风俗习惯可以追溯到什么时候吗？--这很难说。但是，它的特征暗示唐朝。A、B的时态不正确，故选C。