---- How long was it ______ you finally reached your goal of becoming a doctor?
---- Five years.
| A．before | B．since | C．when | D．until |
It’s said that __________ is going to give us a lecture.
| A．an American famous young | B．a famous American youg |
| C．a famous young American | D．a young famous American |
We had ___________ wonderful time_________the party_______ other day.
| A．a,on,the | B．/,at,on | C．a,at,the | D．/,on,/ |
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 |