根据对话内容从方框巾选择能填入空白处的最佳选项补全对话，其中两项是多余的．
A：Hi，Tom．____．
B：I watcher a movie with my brother．
A：____．
B：It's about Mars．
A：____．
B：It's very interesting and I love it．
A：Can you tell me something about the movie?
B：____．The movie tells that astronauts have been to Mars and they have found life there．
A：Really?What else?
B：Do you really want to know more about the movie?
A：Yes．I do．
B：____．
A：You're right．I'll watch it this evening．
A．Of course． B．What is the movie about? C．When will the movie begin? D．What do you think of the movie? E．The cinema is not far from my house． F．What did you do yesterday evening? G．Watch it by yourself and then you will know the answer. |
在点（1，3）处的切线的斜率为（ ）