Believe it or not, the Great Wall, which _______ by people, should be protected at once.
| A．has been destroyed | B．is destroyed | C．was destroyed | D．is being destroyed |
Dogs have a very good ______ of smell and are often used to search for survivors in an earthquake.
| A．sense | B．view | C．means | D．idea |
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 |