In much of the animal world, night is the time ________ for sleep—pure and simple.
| A．set aside | B．set down |
| C．set off | D．set up |
Would it be for you to pick me up at four o’clock and take me to the airport?
| A．free | B．vacant |
| C．handy | D．convenient |
— Excuse me, what's the time for Train 8201?
— It _____ at seven and you can wait in the hall.
| A．left | B．leaves |
| C．will leave | D．has left |
Li Hua has succeeded in the entrance examination and his dream ______ being a university student will ______.
| A．about; be true |
| B．from; turn into practice |
| C．in; become a fact |
| D．of; come true |
He’s from Shanghai, ________ population is the largest of all cities in China.
| A．whose | B．its | C．which | D．that |
Start out right away , you will miss the last train.
| A．and. | B．but | C．while | D．or |