单项选择题
A. twins can help each other B. twins share each other’ s emotion C. twins are able to understand each other in a private language D. twins communicate less with their parents
A. an underground testing site B. an Indian meeting ground C. a tourist attraction D. a motor boat race course
A. Lawn tennis became popular very rapidly in the United States. B. It was Major Walter Wingfield who invented court tennis. C. The sport was called" lawn tennis" shortly after it was invented. D. Miss Outerbridge set up a lawn tennis court with the help of her brother.