单项选择题

23()

A.and 
B.but 
C.or 
D.since

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单项选择题
For whom is the author probably writing this passage()

A. Train engineers.
B. General audience.
C. Professors of statistics.
D. Young children.
单项选择题
what was found in The Council Room ()

A. A small natural opening.
B. A large cave.
C. Another series of rooms.
D. Many old Indian objects.
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