Being afraid of falling behind the times, he has always been keeping himself ___ of the latest development of technology.
A. instructed B. intended C. informed D demanded
With many cities in China dreadfully blanketed by thick haze, the environment problem is _____ Chinese people concern most nowadays.
| A．what | B．which | C．where | D．when |
The doctor tried to laugh my brother ____ his fears about the coming operation.
| A．from | B．against | C．off | D．into |
—Did you manage to get in touch with David?
—No, I didn’t. I ______ him up, but there was no answer.
| A．ring | B．rang |
| C．will ring | D．would ring |
_____ he is enthusiastic and qualified for the job, I see no reason to remove him from office.
| A．Provided that | B．Even though |
| C．Unless | D．As if |
It’s an art to be parents. With children, if you say “no”, you have to mean_____.
| A．that | B．this | C．it | D．one |