单项选择题

23()

A.collect 
B.pile 
C.raising 
D.increase

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单项选择题
Scientists learned about the barred owl migration by ()

A. decoding spotted owl sounds
B. feeding mice to the owls
C. monitoring spotted owl populations
D. researching the Internet
单项选择题
Why do large numbers of people come to Pompeii each year ()

A. To visit the volcano.
B. To shop and eat there.
C. To watch sports and plays.
D. To see how Pompeiians lived.
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