I ________ use a clock to wake meup because at six o’clock each morning the train comes by my house.
| A．couldn’t |
| B．mustn’t |
| C．shouldn’t |
| D．needn’t |
Mr. Black, as far as I know, is said _______ a book on the history of the Ming Dynasty, which turns out to be a bestseller.
| A．to write | B．to have written |
| C．to be writing | D．having written |
The contributions of some companies have ________ much improvement in the teaching and learning environment in this university.
| A．carried out | B．changed from |
| C．resulted in | D．succeeded in |
The company has offered me a job, _________ needs great care and technique．
| A．it | B．that | C．the one | D．one that |
The plane ________ at 8:30 am, so I ________ home at 7:00 tomorrow morning.
| A．leaves; leave |
| B．leaves; am leaving |
| C．is leaving; am leaving |
| D．is leaving; leave |
High school is _______ time of discovery and learning, and it is also _______ very enjoyable and valuable experience for every one of us.
| A．a; a | B．a; 不填 |
| C．不填; a | D．a; the |