—Look at these tracks. It __________ be a wolf.
—It needn't be. It ___________ be a fox.
| A．must; could | B．may; might |
| C．need; must | D．could; need |
. I’ll never forget the day ______ I was born.
| A．in which | B．that | C．on that | D．when |
It was not until midnight ______ they reached the camp site.
| A．that | B．when | C．while | D．as |
I like getting up very early in the morning because the morning air is so good ______.
| A．to be breathed | B．to breathe | C．breathing | D．being breathed |
You ______ be hungry already — you had lunch only two hours ago!
| A．wouldn’t | B．can’t | C．mustn’t | D．needn’t |
The dictionary still ______ where I ______ it last Sunday.
| A．lied; lied | B．lied; lay | C．lays; lay | D．lies; laid |