A: I've been on business trip abroad last month.
B: ______
A: Oh, pretty good, thanks. What about you
B: Just can't complain.

A. Great convenience brought by the computer and Internet and problems with their popularization.
B. Obstacles to be overcome.
C. My suggestions on how to promote their popularization.

A．Yes. You can keep it.
B．No. I'm afraid you should return it now.
C．Three weeks. But you can renew it if you need it for a longer time.
D．You can take it at any time you want.