______Yang Liwei succeeded in circling the earth ______ all Chinese people.

Let’ s have oranges. — ________.

The palace caught fire three times in the last century, and little of the original building ________ now.

Look! The man at the gate ______ be our headmaster.He is always standing there every morning.—No, it ______be him. He is holding a meeting in theoffice now.

We had to stay at home ______ it was raining hard.