—Is that man Mr Hu?—That ______ be Mr Hu. Because he has gone to Japan with his wife.
Though I live in the forest . I don’t feel.
If there are trees, the air in our city will be cleaner.
Will there be more people in 100 years, do you think? , I hope.
He was riding to school it began to rain.
useful invention(发明) the computer is!