. _______ his mother, the baby could not help _______.
| A．To see ；to laugh | B．Seeing ； to laugh | C．Seeing ；laughing | D．To see ；laughing |
Richard looked at the envelope and __________ Jenny's handwriting immediately.
| A．recognized | B．found |
| C．realized | D．concerned |
—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 |