The train had left, so we could do nothing but ________ another.
| A．wait | B．to wait | C．waited | D．waiting |
---- Does your brother study in Beijing University?
---- No, not now. But he ________ there for 7 years.
| A．would study | B．studied | C．has studied | D．was studying |
---- Oh, it’s raining hard outside. Do you think the milkman will arrive?
---- Of course. He will come on time ________ it rains.
| A．in case | B．as long as | C．ever since | D．even though |
To keep healthy, most retired old people____ jogging as a regular form of exercise.
| A．take up | B．make up | C．carry out | D．hold out |
John, may I use your computer now?
Sorry, it is not ____at the moment. It is being repaired.
| A．convenient | B．valuable | C．available | D．comfortable |
Tom, look at your shirt! It requires ________.
| A．washing | B．washed | C．to wash | D．being washed |