A-A+
______my return I learned that my supervisor
问题详情
______my return, I learned that my supervisor had gone to the lab and would not be back for several hours.
A．For
B．In
C．On
D．To请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析：句意是，我一回来就得知我导师刚走，而且几小时后才能回来。词组on one’s return表示“某人一回来就……”，所以正确答案是C选项。
