— What’s the matter with Betty? She likes the book, but she will not buy it.— Betty saves her money _____ buy her mother a present on Mother’s Day.
_________ interesting our school life is!
The students should _________ when the teachers give the lessons.
There’re enough apples and bananas at home. You _______ buy any fruit.
The Greens ____________ in China since 2008.
I saw a street cleaner __________ the street when I went to school this morning.