问题
选择题
My friend ______ from the UK. She studied at Oxford for four years, during which we communicated with each other on the Internet.
A．stepped
B．has returned
C．went
D．has learned
答案
答案：B
题目分析：句意：我的朋友从英国返回来了，她在Oxford大学学习了四年，在这期间我们在网上彼此交流。has returned已经返回来了，完成时表示过去发生的动作对现在造成的影响。结合句意，故选B