________ in Tibet for ten years, he has
题型:选择题
问题:
________ 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
________ 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