问题
选择题
________ in Tibet for ten years, he has been accustomed to the life and the climate there.
A．He has worked
B．Having worked
C．He has been working
D．Working
答案
答案：B
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________ in Tibet for ten years, he has been accustomed to the life and the climate there.
A．He has worked
B．Having worked
C．He has been working
D．Working
答案：B