--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. dates; suggest
D. is; appear
网友回答
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。