_____ I can’t fully understand what his music conveys, his performance is quite impressive．
| A．As | B．Since | C．If | D．While |
They use computers to keep the traffic smoothly．
| A．being run | B．run | C．to run | D．Running |
All flights ________called off because of the terrible weather, they had to go there by train.
| A．were | B．having been | C．being | D．had been |
After the six-party talk in Beijing, an agreement was reached _________ that North Korea would abandon _________ nuclear weapons.
| A．stating; to develop | B．stating; developing |
| C．to state; to develop | D．states; developing |
He never dreamt of _____for him to be sent abroad very soon.
| A．being a chance | B．there being a chance |
| C．there to be a chance | D．there’s a chance |
Finally she got too tired and fell asleep at the desk, her right hand still ______ a pen.
| A．held | B．to held | C．holding | D．was holding |