Some researchers believe that there is no doubt ____ a cure for AIDS will be found.
A．which B．that C．what D．whether
Don't panic; just ______ the rock and I'll come and fetch you down.
A．keep up with B．put up with C．make up for D．hold on to
With a lot of difficult problems ____, the newly -elected president is having a hard time.
A．settled B．settling C．to settle D．being settled
---May I have a word with you? ---______. I'm not busy, anyway.
A．By no means B．By all means C．By means of D．By any means
The experts suggested the problem worth paying attention _____ at the meeting.
A．to be discussed B．to been discussed
C．being discussed D．should be discussed
I wrote him a letter to show my _____ of his thoughtfulness.
A．achievement B．agreement C．attention D．appreciation
