─ did they go to work last week ? ─Once .
During the Spring Festival, taking a plane usually ______ more money than usual.
--What are Mexicans supposed to do when they meet ______ the first time? --They are supposed to shake hands.
The success of Chinese soccer team made all Chinese fans ______.
--Have you handed in your English homework, Lily? --Of course. Shirly ______ it back to me at the end of this morning reading.
I was about to enter the office ______ I heard someone cry “ Earthquake!” loudly outside.