whatever great achievements the future may have in store for China, ______ is likely that many of them will be born in Zhongguancun.
| A．it | B．which | C．she | D．that |
—I haven't seen Tom for years. Any news about him?
—He __________ in a toy factory for two years. Now he is a farmer.
| A．worked | B．has worked |
| C．had worked | D．would work |
—That must have been a long trip.
—Yeah, it __________ us a whole week to get there.
| A．takes | B．has taken |
| C．took | D．was taking |
—Bob has gone to California.
—Oh, can you tell me when he __________?
| A．has left | B．left |
| C．is leaving | D．would leave |
—I've got to go now.
—Must you? I __________ you could stay for dinner with us.
| A．think | B．thought |
| C．have thought | D．am thinking |
I had been working on math for the whole afternoon and the numbers __________ before my eyes.
| A．swim | B．swum |
| C．swam | D．had swum |