—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

家父：父亲

A．老媪：老伴

B．鼻祖：祖宗

C．作者：自己

D．鄙人：自己