To improve their oral English, everyone in the class is supposed to ______ actively in these discussions.
| A．participate | B．attend | C．enter | D．take |
___________ I toured Zhang Jiajie, I was deeply impressed with its beautiful scenery.
| A．For the first time | B．At first |
| C．It was the first time | D．The first time |
Although she is only 17 years old, she _________ drugs for two years.
| A．Addicts | B．has addicted to |
| C．has addicted | D．has been addicted to |
He risked __________ his job to see me off.
| A．Losing | B．to risk | C．being lost | D．Lost |
I was ashamed _________ lied to my mother.
| A．to be | B．of having | C．that | D．of being |
Doctors are doing research to find out what happens physically when people _________ smoking.
| A．quit | B．decline | C．depart | D．reserve |