It is vital that we _____ act out at once to protect the environment.
| A．would | B．should | C．will | D．can |
To make it up to his unpleasant experiences in hospital, the man drank a little more______．
| A．than good health | B．than was good for his health |
| C．than his health was | D．than that his health was |
“Allis necessary for the triumph of the evil isgood men do nothing．” Edmund Burke said．
| A．what; that | B．that; why | C．what; when | D．that; that |
Some people believe that they would be better offmore adaptive activities in their leisure time, such as establishing relationships and teaching their children．
| A．doing | B．to do | C．having done | D．to be doing |
—Are you going to the concert tonight?
—I should have told you that I won’t, ______?
| A．haven’t you | B．shouldn’t you |
| C．are you | D．will you |
“The impact will only growIran’s leaders decide to change course and meet their international obligations,” US Secretary of State Clinton warned．
| A．in case that | B．provided that | C．unless | D．until |