单选题 —How often do you go dancing? — _______________

单选题 —This is Henry speaking. May I ask who is calling please? —_______

单选题 —Hello, may I speak to Henry? —_______

单选题 —I'm too nervous to give a talk in front of so many people. —_______ Mary. You can do it.

单选题 —How was the traffic coming over here? —___________

单选题 —Then when will the promotion be? —______________

单选题 — What's the weather like in your hometown? —___________________

单选题 — What do you think of the documentary Protecting the Earth? — ________ It has attracted lots of TV audiences.