选择适当的词或短语并用其正确形式填空（5分） 1. Lacking necessary money, the small companies ________ one by one during the economic crisis two years ago. 2. He is delighted ________ his driving test and now can drive a car on his own. 3. The magazine is meant ________ white-collar working women in their twenties and thirties. 4. The incident(事件) ________ a chain(系列) of events which led to the outbreak of World War II. 5. It is easy to make a promise, but difficult to ______ it ______. 6. We watched the street lights ________ one after another at dawn. 7. Various factors ________ the downfall of the government. 8. Women only ________ 30 percent of the workforce in that factory. 9. We should avoid ________ this kind of trick again. 10. At the present speed, the world’s oil supply will ________ soon.