We can never expect bluer sky unless we create less polluted world.
| A．a; a | B．a; the | C．the; a | D．the; the |
Father went to his doctor for ______ about his heart trouble .
| A． an advice | B．advice | C． advices | D．the advices |
I really don't know______ I had my money stolen .
| A．when was it that | B．that it was when |
| C．where it was that | D．it was where that |
35. — Could I use your computer for a few moments, please?
— ______. I’m not using it myself.
| A．Come on | B．It depends | C．Go ahead | D．That’s great |
34. The boy whose name is Justin is nowhere to be found, ______?
| A．is he | B．isn’t he | C．is it | D．isn’t it |
33．— Shall I go and buy more food and drinks for the party?
— No, we have prepared a fridge of those. That ______ be quite enough.
| A．can | B．may | C．might | D．Should |