It's high time that we students ______ even harder at our lessons as the national entrance examination is coming nearer.
A．work B．will work C．worked D．have to work
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
The great success of this program has been largely _____ the support given by the 10 local business men.
A．instead of B．thanks to C．due to D．as a consequence
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
