Some researchers believe that there is no doubt ______a cure for AIDS will be found.
| A．which | B．whether | C．that | D．what |
.____exercise early in the morning has become part of his retired life .
| A．Take . | B．Takes | C．Taking | D．Taken |
If he succeeded ____ a job, his children wouldn’ t be suffering
from hunger now.
| A．to find | B．to look for | C．in finding | D．in looking for |
Three-fifths of the buildings____in the earthquake .
| A．was destroyed | B．have destroyed |
| C．were destroyed | D．has destroyed |
Either I or one of your students _____to attend the meeting 
that is due tomorrow.
A .are B. is C .have C. be
we _____ the cost of the holiday and think that we could offord it.
| A．draw out | B．look out | C．carry out | D．work out |