[单项选择]A:I don’’t know why we listen to George B:______
A. I don’t know exactly why, either.
B. I guess we are wrong this time.
C. I know. But perhaps you don’t know why.
D. George, you know, is one of the hardest working students among us.

[单项选择]A:I don’’t know why we listen to George B:______
A. Never mind. Shall we meet on Sunday
B. Your project I have no time studying your project.
C. What about Friday morning I’ll have time to go to the library that afternoon.
D. OK. Library is the best place for us to meet.

[单项选择]W: I don’t know why we listen to George
M:（）
A. I don’ t know exactly why, either.
B. I guess we are wrong this time.
C. I know. But perhaps you don’ t know why.
D. George, you know, is one of the hardest working students among us.

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[单项选择]I don’t know why UFOs are never sighted over large cities by hordes of people. But it is consistent with the idea that there are no space vehicles from elsewhere in our skies. I suppose it is also consistent with the ideas that space vehicles from elsewhere avoid large cities. However, the primary argument against recent extraterrestrial visitation is the absence of evidence.
Take leprechauns. Suppose there are frequent reports of leprechauns. Because I myself am emotionally predisposed in favor of leprechauns, I would want to check the evidence especially carefully. Suppose I find that 500 picnickers independently saw a green blur in the forest. Terrific. But so what This is evidence only for a green blur. Maybe it was a fast hummingbird. Such cases are reliable but not particularly interesting.
Now suppose that someone reports: "I was walking through the forest and came upon a convention of 7000 leprechauns. We talked for a while and I was taken down into their hole in the
A. they want to tell lies
B. they don’t live in the large cities
C. there are only few witnesses
D. the cases are interesting although not reliable