---Why is he so happy?
---He __________ the volunteering club and works for the old people.
| A．takes part in | B．takes an interest in |
| C．takes pride in | D．takes cares of |
—_____ did your cousin leave his hometown?
—He _______ for nearly five years.
| A．When; has left |
| B．When; has been away |
| C．How long; has left |
| D．How long; has been away |
I don’t think what he said is possible, ______?
| A．isn’t it | B．is it |
| C．isn’t he | D．do you |
— _____ are stamps used ______? — Sending letters.
| A．Why; for | B．What; for | C．What; / | D．How; for |
Christmas is coming. Tom will ______ New York for the family get-together.
| A．return back to | B．return to | C．return | D．go back |
—He may be in the classroom, I think.
—No, he _______ be in the classroom. I saw him go home a minute ago.
| A．may not | B．can’t | C．mustn’t | D．needn’t |