.– Jack, when shall we go to visit Mr. Smith? – It’s up to him. We’ll go to see him whenever _______.
Many young people wanted to go to Tibet to________undeveloped land.
_______MP4 and see if you can find out what is wrong with it.
There were beautiful clothes________in the shop windows.
_______you study hard,you’ll succeed in time.
He tried his best to solve the problem,________difficult it was.