1. -----I forget the name of an old school friend at the party.
-----_____. It must have been very embarrassing.
A. Take it easy B. That’s too bad
C. Nothing serious D. Don’t mention it
2. All of us don’t believe the fact__ our best student failed in the competition.
A. that B. which C. when D. why
3. Progress so far has been very good, ____, we are sure that the project will be completed on time.
A. otherwise B. therefore C. besides D. however
