—Your colleague's spoken English is quite good, Amy．
— No wonder, as she in the USA for two years．
A. worked
B. has been working
C. had worked
D. has worked
网友回答
(答案→)A. worked
B. has been working
C. had worked
D. has worked
解析：
考查动词的时态。Amy现在在中国，她在美国工作了2年，是过去的事，故用一般过去时。