John, _______ university professor, is considered to be _______ success as ______ expert in the agriculture research.
| A．a; a; an | B．an; / ; an | C．the; /; an | D．a; the; an |
He didn’t make clear when and where the meeting would be held.
| A．these | B．this | C．it | D．that |
You can have second try if you fail this time.
| A．/ | B．an | C．the | D．a |
The discovery of gold in California a rush to get there.
| A．set off | B．set up | C．set out | D．set in |
I’ll my uncle at Beijing Railway Station.
| A．call for | B．call at | C．call in | D．call up |
You have to be a fairly good speaker to listeners interest for over an hour.
| A．hold | B．make | C．improve | D．receive |