题目

听下面一段较长对话，回答以下小题。【1】How does Nancy look to Daniel? A．Confused.B．Excited.C．Anxious.【2】Why does Daniel mention his performance in a play? A．To comfort Nancy.B．To express his regret.C．To show his pride.【3】What is Nancy going to do next week? A．Take a school test.B．Have a check-up.C．Go in for a competition.【4】What does Daniel offer to do for Nancy? A．Rewrite her lines.B．Drive her to the theatre.C．Help her with the practice.某中学操场外一幢高楼离跑道起点相距170m．同学们在跑步训练时，由于回声先后听到两次发令枪声．若声音在空气中的速度为340m/s，则听到两次发令枪声的时间间隔为（　　）A．0.5sB．0.5minC．1sD．1min