21、关于全面提高对外开放水平的正确表述是( )

5) The report revealed that workers had been exposed(to)high levels of radiation.

4) There was a vast array (of) colors to choose from.

3) Far(from)being angry, he's delighted.

1) There’s a widely held belief that educational standards are(in) decline.

10) Don’t make any reference(to)the drawbacks in his work when you give the lecture

9) We never interfere(in)each other’s business and never get annoyed with each othe

8) I have to admit(to)doubts about his honesty.

7) I’m afraid the gilt of the ring will wear(off)before long.

6) If you are willing, you can sign(up)to participate in the competition.

5) Too many students flunk(out)of the course because their math is weak.