Human beings have driven rare animals and plants ________ of extinction in the past 100 years

A. on the verge 

B. under the verge 

C. at the verge  

D. to the verge

Giải các hệ phương trình  x   +   3 y   +   2 z   =   8 2 x   +   2 y   +   z   =   6 3 x   + y   +   z   =   6

Hello, I’d like to speak to Mr. Green, please________

A. I’m sorry. I’ll call again later

B. I’m afraid I don’t know

C. Sorry. Can you take the message?

D. Sorry. Can you say that again?