单项选择题

Nowhere but around this mountain area ______ such kind of custom in the past twenty years.

[A] we found
[B] we had found
[C] did we find
[D] have we found
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单项选择题
Where does most knowledge of Asian elephant come from
A．From the captured or tamed elephants.
B．From the British wildlife protection group.
C．From elephant hunters in Thailand and Burma.
D．From tourists visiting the Thai-Burmese border.
单项选择题
Why does the man have to go to the office twice
A．The director couldn’t give him an appointment right away.
B．The office was closed the first time he went.
C．The computer was out of service the first time he was there.
D．He did not have acceptable identification with him on his first visit.
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