—Look! It________be the new woman manager. —It________be her.She has just left for Shanghai. 

—Where _____ Mary have put the empty bottles? — She _____ them away. They must be somewhere. 

(2010·北京高考)—Good morning. I've got an appointment with Miss Smith in the Personnel Department.—Ah, good morning. You ________ be Mrs. Peters.

---Look at the boy running on the playground. Is it David? ---It ______ be him. I saw him go to the teachers’ office just now.

According to his will, his money ____be used to build a school instead of a market.