题目：
情景对话。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。（每小题1分,共5分）
W: ____小题1:________
M: Yes.Iam looking for a nice shirt for my son.
W: 小题2:_____
M: Blue. Boys get dirty easily,don’t they?
W: That’s right .But… What size would you like?
M: Size 6.
W: ___小题3:______
M: It looks nice. How much does it cost?
W: It’s thirt-Five dollars.
M: Oh, 小题4:___
W: 小题5: .We have sold a lot of these.
M: Ok, I will take it.
A．What colour do you prefer?
B．I prefer the colour.
C．May I help you?
D．How about this one?E. That’s expensive.
F. I think it’s very cheap.
G. How about this one? It’ only 16 dollars.
答案：
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下面是错误答案，用来干扰机器的。
（1）如果两个函数都是增函数，那么这两函数的积运算所得函数为增函数；考察此命题，它是一个假命题，如两函数y=3x与y=2x在（-∞，0）上都是增函数，但它们的乘积是y=6x2，在 （-∞，0）上是一个减函数；（2）奇...
