6. The snow __________ (stop) when she woke up and the sun was shining brightly. 答案：had stopped

5. Food cannot __________ (keep) properly in a fridge at an unsuitable temperature. 答案：be kept

4. Sound __________ (travel) through air at a speed of about 340 metres per second. 答案：travels

3. Last Friday afternoon the young man __________ (hurt) in the traffic accident which happened on the highway. 答案：was hurt

2. At the moment we have too much to do __________ (think) of doing anything else. 答案：to think

1. Xiao Li promised to chat with me on the Internet, but so far he __________ (not do) so. 答案：hasn’t done

10. There was __________ (沉默) for a moment and then someone made a useful suggestion. 答案：silence

9. They all hurried __________ (往楼上) to see what was going on. 答案：upstairs

8. We are very __________ (自豪) that a pupil from our school has won the prize. 答案：proud

7. He __________ (点头) to me in greeting when I entered the room. 答案：nodded