By the time he was 38, he had become ________ principal of ________ university.
| A．/; an | B．/; a | C．a; an | D．a; the |
Ben has not the least_______ of giving up his research.
| A．intention | B．attempt | C．aim | D．desire |
I wrote him a letter to show my______ of his thoughtfulness.
| A．achievement | B．agreement | C．attention | D．appreciation |
The surgeon_______ his excellent skill in carrying out the operation.
| A．represented | B．instructed | C．demonstrated | D．exhibited |
It is widely accepted that young babies learn to do things because certain acts lead to________.
| A．rewards | B．prizes | C．awards | D．results |
The policeman saved the little girl from the gangs. He’s never afraid of them. I think he is a man of _________.
| A．importance | B．use | C．courage | D．value |