—Where is Zhang Hua? Is he in the classroom now?—He          be there, for I saw him in the teachers’ office just now.

—Do you still go jogging every morning?—Yes, I can’t think of a _______________ way to start a day.

—Would you like some______?—Thank you, but l don’t like it.

----Will Barbara come to our party? ----I am not sure, because he ____ go to the concert with his friend.

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