【题目】—Hi, Nancy ,I didn’t know you had come back. So have you graduated from college?
—Yes .I Biology for four years in Nanjing.
A．have studied
B．had studied
C．studied
D．am studying
在线课程【答案】C
【解析】考查动词的时态。根据前面说到我已经大学毕业，所以说明学法语这动作已经是过去的，此题很容易受到后面的for 5 years的时间状语影响误选A选项