题目内容
I ________ a doctor for 5 years.
[
]|
A .am |
B .be |
|
C .have been |
D .had been |
答案:C
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题目内容
I ________ a doctor for 5 years.
[
]|
A .am |
B .be |
|
C .have been |
D .had been |