-- Why do you feel so unhappy?
--Bad luck . When I arrived at the airport, my flight __________.
| A．took off | B．would take off |
| C．was taking off | D．had taken off |
Just like weather, life_______ be sunny and beautiful all the time.
| A．mustn’t | B．needn’t |
| C．can’t | D．wouldn’t |
It is impossible for _____ little children to do _____ much work within 20 minutes.
| A．so, so | B．so, such |
| C．such, so | D．such , such |
The Hobbit is such____wonderful science fiction movie that I want to see it_____ second time.
| A．a, a | B．a, the | C．/, the | D．/, a |
Nobody knows ______ yesterday.
| A．how the accident happens |
| B．how does the accident happen |
| C．how the accident happened |
| D．how did the accident happen |
The park gates ______ at 10：00 every evening.
| A．lock | B．locked | C．are locked | D．were locked |