国家开放大学 / 综合英语（2）
正确率：100%
–Steve! I haven’t seen you in weeks! What have you been up to?
–
a.I’ve been traveling a lot. In fact, I’ve been to three different cities in the past two weeks!
b.Well, I’ve been studying for entrance exams for the past two months.
c.I’ve been writing an important letter this whole morning.
–
a.I’ve been traveling a lot. In fact, I’ve been to three different cities in the past two weeks!
b.Well, I’ve been studying for entrance exams for the past two months.
c.I’ve been writing an important letter this whole morning.
参考答案：
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