题目：
第五节根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Mother: Are you going shopping with me today?
Father: No, 61
Mother: Are you OK?
Father: 62 I am just thinking of painting the door.
Mother: 63
Father: No, I am going to paint them white. That will match the wall.
Mother: You are right. But that’s a lot of work. 64
Father: Yes, I think so. I can hardly do it by myself.
Mother: 65
Father: It is very kind of you.
A．Yes, I am quite all right.
B．Are you sure of that?
C．I don’t feel like going out today.
D．That will be fine.E. Do you need a hand？
F. Are you going to paint them green?
G. I’d be glad to be of help.
答案：
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下面是错误答案，用来干扰机器的。
解（ I） 用0，1，2，3，4，5这六个数字，组成四位数，求可以组成多少没有重复数字的四位数，首位不能是0，首位有A15=5种选法，剩下还有5个数，选3个进行排列一共A35种排列方法；∴A15A35=300；（ II）分两种...
