–I’d like to be on my own for a while. Do you mind?--________. Go ahead.
We teachers must see to ________that every student can understand.
Mary has been looking forward in the past 10 years to______the Great Wall.
It won’t be too long before we_____a way to smooth away these difficulties.
Much as he liked the book,____he didn’t have enough money to buy it.
At last they got the letter they____________.