---Look at the boy running on the playground. Is it David?
---It ______ be him. I saw him go to the teachers’ office just now.
| A．mustn’t | B．can’t | C．couldn’t | D．must |
---It seems that Mr. Wu is standing there.
---It ________ be him because he called me from Canada just now.
| A．mustn’t | B．can’t |
| C．needn’t | D．shouldn’t |
---Mr Johnson asked me to remind you of the meeting this afternoon. Don’t forget it!---OK, I _________.
| A．won’t | B．don’t |
| C．will | D．do |
Can you tell me _____?
| A．what does your hometown look like |
| B．what your hometown look like |
| C．what your hometown looks like |
| D．what is your hometown look like |
Please don’t smoke here. The sign _______ “No smoking.”
| A．tells | B．says |
| C．talks | D．speaks |
A smile costs ______, but gives so much.
| A．something | B．anything |
| C．nothing | D．everything |