With many cities in China dreadfully blanketed by thick haze, the environmental problem is _____ Chinese people concern most nowadays.
| A．what | B．which | C．where | D．when |
Noise is unpleasant, ________ when you are trying to sleep.
| A．seriously | B．specially |
| C．especially | D．naturally |
It's quite warm here; we ________ turn the heating on yet.
| A．needn’t | B．mustn't | C．couldn’t | D．wouldn't |
Sarah made ______ to the airport just in time to catch her plane this morning.
| A．herself | B．this | C．that | D．it |
—Would you mind if I sit here?
— _________. It is for Mr. Brown.
| A．Not at all | B．Never mind |
| C．Better not | D．Of course not |
Now more and more workers ______their free time trying to improve themselves at school or college.
| A．take | B．cost | C．spend | D．pay |