China is a very big country with a long history and _______minorities,up to fifty-six, who live happily and harmoniously on this vast land.
He was so busy that _____ I could say hello to him he had rushed out of the room.
If we work hard with a strong will, we _____ overcome any difficulty, however great it is.
—Did Betty go shopping with you yesterday? —Even if she _____ a lot of studying, she would have preferred staying home to going shopping.
With masses of homework _____, I can hardly spare time to practice playing the piano.
Take great pains to read _____ you can or you won’t have a better understanding of life.