—Have you been to the United States?—Yes, only once. I ________ there only for seven days.
In the good care of the nurses, the boy is ____ recovering from his heart operation.
I like this house with a beautiful garden in front, but I don’t have enough money to buy__________.
_____ , the pay isn’t attractive enough, though the job itself is quite interesting.
He told us whether _________ a picnic was still under discussion
Practising Chinese kung fu can not only _____ one’s strength, but also develop one’s character.