--Well done, Jack !
--Thanks. But given more time, I__________ it better.
| A．shouldn't have done | B．could have done |
| C．might not do | D．could do |
National Day ________ people singing and dancing happily in the street.
| A．saw | B．watched | C．observed | D．felt |
As there was no one she could________， she felt very helpless.
| A．turn to | B．turn on | C．turn off | D．turn over |
It was announced that only when the fire was under control ________to return to their homes.
| A．the residents would be permitted |
| B．had the residents been permitted |
| C．would the residents be permitted |
| D．the residents had been permitted |
—Do you have any idea what your former boss would say about you?
—I don't know，________.
| A．so do I care | B．so I don't care |
| C．nor I don't care | D．nor do I care |
With a lot of assignment ________， little Tom still feels very easy.
| A．do | B．done | C．doing | D．to do |