_____ born in Chicago, the author was famous for his stories about New York.
| A．Since | B．Once | C．When | D．Although |
——I can’t get on with some of my classmates. They just leave me in the cold.
—— . But what’s the reason?
| A．Sorry to hear that. | B．How about that? |
| C．Don’t mention it. | D．Never give up. |
Mr. Lee, who as a carpenter for over 10 years, is now a very famous statesman in this country.
| A．has worked | B．had worked | C．worked | D．works |
Helping others is a habit, you can learn even at an early age.
| A．it | B．that | C．what | D．one |
Vitamin D helps our bodies make a special chemical, and this special chemical, ________, affects our brains, making us feel happy.
| A．in turn | B．in particular | C．in advance | D．in short |
Don’t worry about the child. Next to him ________ a lady, _______ he can turn when he is in trouble.
| A．sits; whom | B．sits; to whom |
| C．is sitting; with whom | D．was sitting; to whom |