单项选择题
A. regulations against job discrimination B. the safety of other performers and the audiences C. doing the right thing D. making a lot of money
A. who is responsible for the tragedy B. whether Romeo and Juliet are tragic characters C. what the most fascinating element of the play is D. how tragic fate can be avoided
A. The Invention of Umbrella. B. The History of Umbrella. C. Umbrella -- A Symbol of Honor. D. Who Used Umbrella First