Lucy is talking to Huong, her Vietnamese friend, about air pollution in Hanoi.

- Lucy: "Is there anything we can do about the toxic air pollution in Hanoi recently?"

- Huong: "______, but the only thing we can do is to avoid outdoors and wear masks."

A. exaggerate                  

A. confident           

A. There should be a hundred people at the meeting. 

B. There may be a hundred people at the meeting. 

C. There must be a hundred people at the meeting. 

A. She didn't take her children to the zoo two months ago. 

B. She has taken her children to the zoo for two months. 

C. She had two months to take her children to the zoo. 

A. few                         

A. The tempo of extinction of species today 

B. The two ways in which species disappear 

C. Deforestation as a major cause of mass extinctions of species 

A. preparing