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5. He stayed up late into night last night. This is        he was late for school.

4.       coincidence,both candidates have come up with the same solution to the problem.

3. We can't figure        why quite a number of insects and birds are dying out.

2. We agree with the government's prediction        the economy will improve.

1. As a role model,I don't think most people can imagine        it's like to be watched that closely every minute of the day.

10. Mary failed the driving test again.  If she        ( practise) harder,she would have passed the test easily.

9. The missing children haven't been found yet. Something terrible (hap?pen) to them.

8. To catch up with the times,we must keep ourselves        (inform) of the current news.

7. Of the two paintings,Mr Black chose the cheaper one out of        (prefer) ， though it was not the work of a famous painter.

6. ―Miss Wang,I feel very nervous with the competition        (approach) . 一Take it easy. As long as you can finish it,it is a victory.