I think camping out is _______ great fun, for we can get close to _______nature and learn something useful at the same time.
| A．不填; 不填 | B．不填; the |
| C．a; 不填 | D．a; the |
---Anything new in the new regulations?
---They will beto us all.
| A．of great benefit | B．do harms | C．do many good | D．for the benefit |
I got up early this morning, but I ________ so because I was not on duty today.
| A．mustn’t have done | B．needn’t have done |
| C．didn’t need to do | D．can’t have done |
It’s dangerous to have the fire _______ at home all night long.
| A．to burn | B．burn | C．burned | D．burning |
—Are you satisfied with this hotel ?
—Not a little. We can’t have _________ .
| A．a nicer one | B．a worse one | C．such a bad one | D．so nice one |
We______ the old scientist _____his contribution ______the country.
| A．admire; for; to | B．admire; at; to | C．respect; on; for | D．respect; on; at |