He was lost in the busy streets. But at last it was of him to find the way home.A. lazyB.

问题补充：

He was lost in the busy streets. But at last it was of him to find the way home.

A. lazy

B. tough

C. clever

D. natural

答案：

A. lazy

B. tough

(答案→)C. clever

D. natural

解析：考查词义辨析。lazy 懒惰的，tough 艰难的，clever 聪明的，natural 自然的，句意：他在繁忙的大街上迷路了，但是最后他非常的聪明找到了回家的路。所以选C。