_______ the news of his father's death, he burst into tears.
| A．After hearing | B．On hearing | C．While hearing | D．Having heard |
The old man sat in front of the radio every evening, ______ his favorite program.
| A．dying to hear | B．was dying to hear | C．dying to have heard | D．is dying for hearing |
Each week he tried to _____________ a few dollars for an overseas trip.
| A．set apart | B．set aside | C．set about | D．set out |
He made another wonderful discovery, _______________ of great importance to science.
| A．which I think is | B．which I think it is | C．which I think it | D．I think which is |
The little girl crossed a large area of grassland into the woods _________ she realized that she was lost.
| A．when | B．as | C．after | D．before |
With many years of working experience, Jack is ___________ for the job.
| A．required | B．qualified | C．substituted | D．distributed |