When solving the problem a second time, you’d better be more careful____you made a mistake.
| A．in case | B．where | C．in which | D．that |
I don't remember___________ to the airport that year.
| A．to be taken | B．being taken | C．having | D．to take |
A man does not know the difficulty of anything_________ he does it personally.
| A．although | B．if | C．because | D．unless |
There is a _________ of 1000 dollars for the return
| A．reward | B．prize | C．thank | D．prsise |
Isn't it very kind __________ your parents to do that for us?
A. for B to C. about D. of
I caught the last bus from town, but Harry came home___________ that night.
| A．very late | B．even later | C．the same late | D．the last one |