--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 |
__from Adelaide to Darwin and you’ll observe some of Australia’s most beautiful landscapes.
| A．Traveling | B．To travel | C．Traveled | D．Travel |
It is in the year of 2010 a severe drought hits Yunnan province.
| A．until | B．that | C．before | D．when |
The sale usually takes place outside the house ，with the audience on benches，______chairs or boxes。
| A．having seated | B．to seat | C．seated | D．seating |
We still remember once__________round the famous tower when we were young.
| A．having taken | B．to be taken |
| C．having been taken | D．to have taken |
— Marx looks nervous.
— So____________you if you had so fierce a competition.
| A．do | B．did | C．will | D．would |