28. The water will be further polluted unless some measures ______.
| A．will be taken | B．are taken | C．were taken | D．had been taken |
–Did you find your new dictionary?
---Yes. I found it ____I had left it.
| A．in where | B．in the place which |
| C．where | D．which |
–Will you ______me ____out this problem myself?
---OK.
| A．make; work | B．permit; working | C．let; work | D．allow; work |
–When did the concert_____?
---Oh, two days ago.
| A．happened | B．take place | C．hold | D．start |
________arriving in Tibet , the soldiers at once joined them ____their work.
At; with B. On; in C. For; with D. After; to
–Did Li Hua’s parents leave her any money?
--- No. She has to support _______by selling newspapers.
| A．on her own | B．by herself | C．alone | D．herself |