China understands the situation and needs of underdeveloped countries on the issue of climate change and urges developed countries to support them______ technology and finance.
| A．in spite of | B．owing to | C．regardless of | D．in terms of |
—Do you know ____ made him successful in his career?
—Yes. His hard work and determination, of course.
| A．what it was that | B．what was it that |
| C．it was what that | D．was it what that |
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 |