2 . He ________(突然倒下；倒塌) in the street and died two hours later. (根据汉语提示单词拼写)

3 . The roof ______(collapse) under the weight of snow. (所给词的适当形式填空)

4 . If the rules and regulations of a country___________(崩塌), the whole society would get into a mess. (根据汉语提示单词拼写)

7 . Direction: Complete the sentences with the proper forms of words or phrases in the box. Note that there is one extra that you do not need.

A. submissive       B. colossal       C. follow suit       D. pounced on E. slamming       F. collapsed       G. optimal       H. contradicting I. have an edge over       J. plunged       K. reinforce

1. From ____farms in America to the destruction of the Amazon, researchers investigated how our hunger for meat is killing our planet.
2. The final technical report into the accident can______ the findings of initial (最初的) investigations.
3. A Journalist has tested the safety of a 430-metre-long glass bridge by_______ it with a hammer.
4. He was looking for a quiet and______ wife who would obey his every word.
5. Desperately needing to cool off, I_____ my hands into the cold water and threw it over my face.
6. He kept________ himself when we were arguing. I think he was a bit confused.
7. A mixture of selected funds is a (n)_____ choice for future security and return on investment.
8. Internet banks______ their old-technology rivals when it comes to charges and rates, but they are not immune from complaints.
9. He_______ the photographer, beat him up, and smashed his camera.
10. At the end of the race his legs gave out and he________ on the ground.