—Catherine, I have cleaned the room for you.
—Thanks. You____ it, I could manage it myself.
| A．needn’t do | B．needn’t have done |
| C．mustn’t do | D．shouldn’t have done |
29. That prices are going up so rapidly these day,_______really makes many people worried
| A．it | B．that | C．which | D．they |
28. This is the best restaurant in our town. I’m afraid you can’t find _______ here.
| A．a better one | B．the better one | C．the best one | D．any best one |
27. Our headmaster felt fairly happy today because ten students were praised at the meeting, _____three were from our school.
| A．for them | B．of whom | C．of them | D．of that |
26. ______more and more forests destroyed, some animals are facing the danger of dying out.
| A．With | B．By | C．As | D．For |
25. ---- Ricky, why hasn’t Billy been with us these days?
---- Oh, he is _________for next month’s 400m race.
| A．standing out | B．taking up | C．backing out | D．working out |