The president spoke at the business meeting for nearly an hour without ___ his notes.
| A． bringing up | B． referring to |
| C． looking for | D． trying to |
I appreciate _____ the opportunity to work in your company two years ago．
| A．giving | B．to give |
| C．being given | D．to be given |
_____ economic, political and cultural differences, it is difficult for China and America to fully understand each other．
| A．Apart from | B．Regardless of |
| C．On account of | D．In terms of |
Disadvantages as they have, online games never fail to _____ a large number of teenagers．
| A．appeal to | B．object to |
| C．refer to | D．turn to |
—Could we complete the task according to the schedule?
—I doubt that．The problem remains _____ we can get financial aid from the government．
| A．that | B．when | C．why | D．where |
Drunk driving used to occur _____, but now it is under control．
| A．frequently | B．generally | C．practically | D．gradually |