31．In summer, food will go bad if_________in room temperature.
| A．leaving | B．left | C．being left | D．having left |
______of them knew about the plan because it was kept a secret.
| A．Each | B．Any | C．No one | D．None |
_____ 2008 Beijing Olympic Games were _____ success.
| A．The; x | B．The; a | C．x; a | D．x; x |
---____ do you go to the movies?
--- Once a week.
| A．How long | B．How much | C． How soon | D．How often |
It should bethat the civil servant should be dismissed for the drunk driving．
| A．out of control | B．out of practice | C．out of place | D．out of question |
What I want toto teenagers is that being addicted to the Internet will to some extent do harm to both mental and physical health．
| A．get off | B．get through | C．get across | D．get down |