1 . As is known to all, one way for people to prevent COVID-19 is to open the windows to allow the air to________.

A．calculate

B．circulate

C．investigate

D．accelerate

2 . Leave a gap at the top and bottom so air can circulate.

A．进来

B．出去

C．留住

D．循环

4 . Those who _________ false news should be blamed.

A．circulate

B．stage

C．stress

D．extend

6 . Directions: Fill in each blank with a proper word chosen from the box. Each word can only be used once. Note that there is one word more than you need.

A. installed        B. track               C. cover                      D. enthusiastic        E. impressed               F. circulated G. dumped        H. absorbed        I. consciousness        J. thrill                      K. economic

1. The military use radar satellites to ________ targets through clouds and at night.
2. Having been ________ to all the members, the report was fully discussed and carefully revised.
3. To her surprise, the proposal she put forward at the meeting met with a（n）________ response.
4. The current situation is that toxic chemicals continue to be ________ into the river.
5. Her ________ of the feelings of others was the thing that made her a fantastic doctor.
6. With the help of the security cameras ________ in the city, the police soon located the position of the criminal.
7. Even though he’s been acting for years, he still gets a（n）________ out of going on stage.
8. Evidence has piled up that Vitamin D is ________ by the body after exposure to sunshine.
9. Watson eventually left the harbor, under ________ of fog, and he was later arrested on an ice field where the hunt was taking place.
10. The experts suggested that people should not expand their business in the current ________ climate.

9 . 选词填空

A. acknowledge     B. consult   C. owe   D. circulate     E. contract

1. With no solid evidence, he refused to _______ stealing the lady’s purse.
2. He is a famous lawyer and many people come to _______him about some cases.
3. Because of your help, I have made great progress in my study. In other words, I __my progress to your help.
4. The economy continues to _______, raising fears of further political problems.
5. During an emergency period, those who _______false news should be severely punished by the authorities.