It is difficult for us to learn a lesson in life ________ we’ve actually had that lesson.
| A．until | B．after | C．since | D．when |
Is it to hold the 2010 World Exhibition _______ makes Shanghai the focus of the world?
| A．when | B．that | C．which | D．what |
We can never expect bluer sky unless we create less polluted world.
| A．a; a | B．a; the | C．the; a | D．the; the |
My headache is killing me．I it away．But now it’s getting worse and worse．
| A．think; is going | B．thought; was going |
| C．have thought; is going | D．had thought; was going |
---Rose, mind your step! Aunt Jane slipped over on the wet floor and broke her leg yesterday．
--- ___．
| A．It’ s none of your business | B．It doesn’t matter to me |
| C．Thank you for your reminding | D．I will remember your words |
The door．Better have it repaired．
| A．won’t shut | B．hasn’t been shut | C．won’t be shut | D．isn’t shut |