动词填空 用括号内所给动词的适当形式填空，并将答案写在答题卡标有题号的横线上。（本大题共10分，每小题1分）
Xiao Li promised to chat with me on the Internet, but so far he __________ (not do) so. 答案：
At the moment we have too much to do __________ (think) of doing anything else. 答案：
Last Friday afternoon the young man __________ (hurt) in the traffic accident which happened on the highway. 答案：
Sound __________ (travel) through air at a speed of about 340 metres per second. 答案：
Food cannot __________ (keep) properly in a fridge at an unsuitable temperature. 答案：
The snow __________ (stop) when she woke up and the sun was shining brightly. 答案：
Every one of us was excited, for in a few minutes we __________ (see) Liu Xiang appear on the sports ground. 答案：
The Women’s World Cup __________ (not begin) until 1991 when China hosted it in Guangzhou. 答案：
Understanding yourself is very important to __________ (build) self-confidence. 答案：
On Earth, gravity keeps our feet on the ground and makes anything we drop __________ (fall) towards the ground. 答案：