When first____ to the market, these products enjoyed great success.
| A．being introduced | B．having introduced | C．introduced | D．introducing |
Students should _______ everything important that their teachers give in class.
| A．set up | B．set down | C．set aside | D．set out |
We are living in an age _______ many things are done on computers.
| A．which | B．that | C．whose | D．when |
_______ breaks the law should be punished .
| A．Those who | B．Whomever | C．No mattter who | D．Whoever |
Love is ______ way of life,but not _____ aim of it.
| A．the , the | B．a , the | C．a, an | D．the, an |
--- Must I stay at home, Mum?
--- No, you_____
| A．needn’t | B．mustn’t | C．don’t | D．may not |