单项选择题
A. He is ambitious. B. He is only 11 years old. C. He lives in Chicago. D. He has joined the club for 6 years.
A. The world couldn’t be it if there were no dust. B. Dust in some way is very important to our world. C. Dust is not part of our world. D. Dust in a certain degree makes our world.
A. In 1598. B. In 1650. C. In 1823. D. In 1750.