We can never expect bluer sky unless we create less polluted world.
| A．The; the | B．/; the |
| C．A; the | D．a; a |
Stella was disappointed to find her new plan ______ and fell into great depression.
| A．put away | B．carried out | C．turned down | D．left out |
Expo 2010 Shanghai China will offer ____ wonderful opportunity for ____ cross - culture dialogues．
| A．a;不填 | B．a;the | C．不填;the | D．the;不填 |
We walked as fast as we could,____ to catch the 9:30 train．
| A．to hope | B．hoping | C．hoped | D．hope |
-- I saw Mr Li at the meeting yesterday.
--- Did you? He ______ have attended, for he had asked for sick leave.
| A．needn’t | B．couldn’t | C．shouldn’t | D．mustn’t |
. Tom said he had been working for three hours, ________, evidently, was untrue.
| A．he | B．this | C．which | D．it |