—It’s nice. Never before ___ such a special drink!
—I’m glad you like it
| A．I have had |
| B．I had |
| C．have I had |
| D．had I |
Something must be done to stop cutting down trees. ________ all the trees are cut down, the valuable soil will be washed away by the heavy rain.
| A．Whether | B．Unless |
| C．Once | D．Until |
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 |