1 . 选用方框内合适的内容替换下列句子中的划线单词。

A. at once                         B. broke out             C. happen D. official statement             E. terrible storm

1. The writer was sleeping downstairs when the volcano erupted.
2. When the fire alarm sounds, act immediately to ensure your safety.
3. We were shocked by the announcement that the heavy rain caused a landslide.
4. If headaches only occur at night, lack of fresh air and oxygen is often the cause.
5. A hurricane can tear down houses, cause landslides and floods and leave millions homeless.

5 . The___________(announce) of isolation (隔离) at home during the time when COVID-19 broke out was welcomed by the public. (所给词的适当形式填空)

6 . 根据英文释义写出单词
1. a sport in which two people fight with each other with their hands ________
2. sth. moves quickly away from a surface it has just hit ________
3. a spoken or written statement ________
4. the act of protecting sb. / sth. from attack ________
5. the group of people who have gathered to watch or listen to sth. ________
6. to help sb. remember sth. ________
7. to use your teeth to cut into sth. ________
8. to stop sth. from being done or used especially by law ________
9. a particular situation ________
10. happening or done once every year ________