There 's a teacher _____ with your parents in the teachers' office.
| A．is talking | B．talks | C．to talk | D．talking |
That computer_____ me quite a lot of money.
| A．spent | B．cost | C．took | D．paid |
I never forget the days when I enjoyed ______ a good time in Beijing.
| A．have | B．to have | C．had | D．having |
We shall never give up ______ for even one day.
| A．studying | B．study | C．to study | D．studies |
Would you mind turning down the music? ______
| A．Yes , please | B．No , not at all |
| C．No , please | D．Yes .I do |