Who’s that boy reading in the study ? Is it David?—It __________ be David. I saw him go home just now.

Mom, I got the best grade on the English test today.—Good job, son. I’m ______of you.

We should not eat meat.

I have two tickets for the film. One is mine and _____ is yours.

_____________, Gao Xiaosong was sentenced to 6-month imprisonment–the most severe punishment about drunk driving–on June.