Look, Mr Green is on the other side of the street. — It _____ be him.He has gone to London on business.

____ have you lived here? —Since last year. [ ]

Do you know the big boy ________ helped to catch the thief yesterday ? — Yes, Li Ming, the chairperson of the Students’ Union .

He is old, but he ____ have gray hair.

Does Zhu Yong do _______ in English?—Yes. And Zhu Hong is even _______.