打电话时如果想知道对方是谁,应该问: A. Who are you? B. Who’s that? C. Who’s this?
()- Hello. Can I speak to Sara? -- _____.
()- What's the weather _____ today? -- It's windy.
()Look, the boys ________ badminton outside.
()Peter is _____ in his class.
()How can I _____ there?