—This returned Chinese scholar has become one of the top experts in this field .
—Yes , I know him very well . He in Africa with wild animals for eight years .
| A．has worked | B．had worked | C．worked | D．has been working |
I hadn’t expected Robert _____,but I had hoped____.
| A．to apologize, that he could call | B．apologize, that he would call |
| C．to apologize, him call me | D．to apologize ,him to call me |
Her son promised _____in the bedroom until the baby stopped_______.
| A．staying ,to cry | B．to stay ,crying | C．for staying , to cry | D．to stay, to cry |
In the past , people used _____that the moon was too far away ________.But now it is possible for man ____there by spaceship.
| A．to think ,not to reach ,to get |
| B．to think ,to reach ,to get |
| C．to thinking ,to reach ,will get |
| D．thought ,to reach , to get to |
The Olympic Games, _______in 776 B.C ,did not include women players until 1912.
A. first played B. to be first played C. first playing D. to be first playing
I can hardly imagine Peter ______across the Atlantic Ocean in five days.
| A．sail | B．to sail | C．sailing | D．to have sailed |