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求作业答案:动词填空, 用括号内

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求作业答案:动词填空, 用括号内
动词填空, 用括号内所给动词的适当形式填空.
1. Xiao Li promised to chat with me on the Internet, but so far he __________ (not do) so.
2. At the moment we have too much to do __________ (think) of doing anything else.
3. Last Friday afternoon the young man __________ (hurt) in the traffic accident which happened
   on the highway.
4. Sound __________ (travel) through air at a speed of about 340 metres per second.
5. Food cannot __________ (keep) properly in a fridge at an unsuitable temperature.
6. The snow __________ (stop) when she woke up and the sun was shining brightly.
7. Every one of us was excited, for in a few minutes we __________ (see) Liu Xiang appear on the
    sports ground.
8. The Women's World Cup __________ (not begin) until 1991 when China hosted it in Guangzhou.
9. Understanding yourself is very important to __________ (build) self-confidence.
10. On Earth, gravity keeps our feet on the ground and makes anything we drop __________ (fall) towards
     the ground.

1. hasn't done
2. to think
3. was hurt
4. travels
5. be kept 6. had stopped
7. would see
8. didn't begin
9. build
10. fall