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7£®ÌýµÚ8¶Î²ÄÁÏ£¬»Ø´ðµÚ10ÖÁ12Ì⣮10£®What does the woman say about the science book£¿
A£®It's of little value£®
B£®It's in bad condition£®
C£®It's an old edition£®
11£®How much will the woman pay the man£¿
A.30£®
B.23£®
C.21£®
12£®Why is the woman unwilling to buy more textbooks£¿
A£®She isn't sure what textbooks will be used£®
B£®She hasn't enough money to buy more£®
C£®She doesn't like books marked with notes£®
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