No one knew where my grandfather was and many came to us in searching for him.A. helpB. a

问题补充：

No one knew where my grandfather was, and many came to us in searching for him.

A. help

B. assist

C. provide

D. encourage

答案：

A. help

(答案→)B. assist

C. provide

D. encourage

解析：本题从动词的搭配关系的角度可知答案为B。assist sb in doing sth帮助某人做某事。help sb (to) do sth; provide sb with sth; encourage sb to do sth。