问题
选择题
My friend has returned from the UK. She ______ at Oxford for four years, during which we communicated with each other on the Internet.
A．studied
B．has studied
C．had studied
D．has been studying
答案
答案：A
时态题。 我的朋友从英国回来了，她在牛津学习了四年在那期间我们经常网上联系。 根据语境她现在不在牛津学习了所以用一般过去时态，选A