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