We are bound ______ with difficulties in carrying out this research.
| A．to meet | B．to have met |
| C．meeting | D．having met |
He was not an actor, who often appeared on stage, _____ a writer, writing stories.
| A．but | B．and | C．then | D．so |
He transplanted the little tree to the garden _____ it was the best time for it.
| A．where | B．when | C．that | D．until |
-----“What did he ask you?”
-----“_____ I would be late.”
| A．That | B．When | C．Where | D．Whether |
He had a lot of friends, but none of _____ could lend him any money.
| A．whom | B．them | C．which | D．who |
_____ when one loses freedom does one know its value.
| A．Just | B．Only | C．Even | D．Ever |