Although they just met for the first time, they talked _____ they had been friends for many years．
| A．as long as | B．even if | C．such as | D．as if |
When we get knocked down, we get back up and we come back stronger, and, ____ I’m President, that’s what we’ll keep doing.
| A．even though | B．as if | C．now that | D．as long as |
______ he referred to in his article was often discussed by many people.
| A．That | B．What | C．Whether | D．Where |
She will tell us why she feels so strongly that each of us has a role _____ in making the earth a better place to live.
| A．to have played | B．played | C．playing | D．to play |
The Russian rocket designer has died. For many years, he ______ as an important assistant to the father of Soviet space program.
| A．serves | B．was serving | C．served | D．has served |
I have been living in the United States for 20 years, but seldom ______ so lonely as now.
| A．have I felt | B．I had felt | C．I have felt | D．had I felt |