Look, dark clouds are gathering. It is________ to rain soon.
| A．probably | B．possibly |
| C．likely | D．perhaps |
—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 |
The letters for the boss __________ on his desk but he didn't read them until three days later.
| A．were put | B．was put |
| C．put | D．has put |