_____ his research paper, Professor Reagan experienced various hardships and loneliness for nearly half a year．
A．Accomplishing B．To accomplish
C．Accomplished D．Having accomplished
____ the flight to New York will be delayed is _____ I’m especially worried about．
A．When; what B．Whether; that
C．When; that D．Whether; what
---Have you finished your composition already, Jack?
---Yes, I ____ it within half an hour．
A．have finished B．finish
C．finished D．had finished
---Can you tell me Sam’s telephone number?
---_________．Who is Sam? The newcomer?
A．I think so B．That’s OK
C．I’d rather not D．I’m afraid not
The three teams _____ different ways to solve the problem and they all succeeded at last．
A．adopted B．admired
C．adapted D．Addicted
The band was very successful in the seventies, most of _____ members were in their twenties．
A．its B．whose C．whom D．Which
