29．The patient who had suffered from H1N1 insisted on_____________from others immediately, holding the belief that the disease would infect others．
| A．being isolated | B．having isolated | C．to be isolated | D．Isolating |
Dina,__________ for months to find a job as a waitress，finally took a position at a local advertising agency.
| A．struggling |
| B．struggled |
| C．having struggled |
| D．to struggle |
__________ in the queue for half an hour, the old man suddenly realized he had left the cheque in the car.
| A．Waiting |
| B．To wait |
| C．Having waited |
| D．To have waited |
__________ at my classmates' faces, I read the same excitement in their eyes.
| A．Looking |
| B．Look |
| C．To look |
| D．Looked |
__________ is known to everybody , light travels faster than sound.
| A．It |
| B．As |
| C．That |
| D．What |
This kind of ancient book requires a great deal of .
| A．concentration | B．attraction |
| C．appreciation | D．notice |