What did John ask you just now?

--- He wanted to know how long _________ when I reached the cinema.

A. had the film been on            B. the film had started

C. the film had lasted              D. had the film ended

—What did the teacher say just now?
—He asked me _____

The Greens walked ________ the door just now.

       A. over     B. at    C. on     D. through

—Do you know_________ Emma is?

—I met her on the playground just now．

　 A．what　 B．how　 C．where　 D．who

 —Look at the boy running on the ground. Is it David?

        —It      be him. I saw him go to the teacher’s office just now.

A. must           B. mustn’t       C. can’t      D. might