Question

— Mr. Lee _   to a student when I entered the classroom this morning.
- He is very patient _  _he is young.

A．talking; but

B．talks; though

C．was talking, though

D．talked, however

Answer 1

C 解析:
过去进行时与though的用法。由when I entered判断前半句为过去的动词（过去进行时），故A,B错，根据题意表达的是“尽管他年轻，但是很有耐心。故选择C。