It’s necessary for us English well.
The number of the workers in this factory ________1,500. A number of them ______ from the countryside.
A lot of food __around the world every year. We must do something for it.
________the afternoon of June 1st, many foreigners arrived ______Beijing.
Mom, I don’t know how to work out the math problem. Could you give me a hand?
Why are you mad at me, John?