Only later, after the alcohol had had its less effect, ________.

A．the conversation had deepened

B．had the conversation deepened

C．the conversation deepened

D．did the conversation deepen

把句子补充完整。

1．_____________________，人在天涯鬓已斑。

2．滴水能把石穿透，_____________________。

3．悠悠_____________，____________故乡情。

4．黑发_____________，白首方悔__________。

5．___________破万卷，__________________。