—Do you think a radio is useful in learning English?—Sure. A radio can _____ listening English songs and reports.
In our school library there a number of books and the number of them growing larger and larger.
The workers were made from morning to night in the past.
—Are all the students from in your class? —No, there are only three in our class. The others are from other countries.
Jack is nine years old. Today is his birthday.
—How happy the grandparents are! —Yes, they for fifty years.