—I for you for two hours but in vain. Where did you go? —I at my uncle’s.A. had looked;

问题补充：

—I for you for two hours, but in vain. Where did you go?

—I at my uncle’s.

A. had looked; may have stayed

B. looked; must have stayed

C. have looked; may be staying

D. looked; must be staying

答案：

A. had looked; may have stayed

(答案→)B. looked; must have stayed

C. have looked; may be staying

D. looked; must be staying

解析：本题考查时态。根据句意可知“我寻找你两个小时”是过去发生的事情，故用一般过去时；must have done表示过去一定做某事。故选B。