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This old computer must have been of great use to ____________ did the scientific research.
| A．those | B．when | C．whoever | D．whomever |
Do you still remember the rider and his new bike we saw in the street last week?
| A．which | B．who | C．that | D．whom |
Tony the fact that he had made a mistake．
| A．accounted | B．permitted | C．allowed | D．acknowledged |
But for her help，we the task in time．
| A．will not finish | B．had not finished |
| C．can not finish | D．could not have finished |
The guidance booklet can be of great help towants to do the job．
| A．whoever | B．whomever | C．no matter who | D．who |
He felt happy when his boss stated that he couldsome time for exercise．
| A．set out | B．set aside | C．set off | D．set up |