When I worked as the general manager of the firm, I sometimes had _____ to visit London on business.
| A．opportunity | B．possibility | C．occasion | D．chance |
I still remember __________ to the Fa-men Temple and what I saw there.
| A．to take |
| B．to be taken |
| C．taking |
| D．being taken |
__________ not to gamble during the World Cup, those crazy people had to give up.
| A．Warned |
| B．Warning |
| C．Having warned |
| D．Having been warned |
Research __________ out by several experts suggests that the oil spill in the Gulf has caused the fatal damage to the environment.
| A．to carry |
| B．carrying |
| C．being carried |
| D．having carried |
My brother has always insisted on his __________ Tom instead of Tim.
| A．calling |
| B．called |
| C．having called |
| D．being called |
At the beginning of the class, the noise of doors__________ could be heard many times.
| A．opened and closed |
| B．to be opened and closed |
| C．being opened and closed |
| D．to open and close |