单项选择题

What does the woman mean

A．She is busy now.
B．The operator did the same thing to her.
C．If the line is busy, the man should dial later.
D．She can’t reach the operator either.
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单项选择题
Why did the scientists work so hard at mapping the human genome
A．Because the human genome can destroy many illnesses.
B．Because the human genome’s completion can help to get rid of many diseases.
C．Because they wanted to be better known than others.
D．Because the Human Genome Project can provide a lot of chances of work.
单项选择题
How much do the jackets cost
A．The price is not on the tag.
B．$50.
C．$15.
D．$5.
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