The boys followed the marks that they ______, until finally they found their way back to the campsite.
| A．left | B．have left |
| C．had left | D．have been left |
—What do you think of the hotel here?
—Oh, wonderful! We ____ a better one than this.
| A．won’t find | B．can’t find |
| C．must have found | D．couldn’t have found |
We are all looking forward ______ the Great Wall during the National Day.
| A．to visiting | B．to visit |
| C．for visiting | D．for a visit to |
_________ production up by 60%, the company has had another excellent year.
| A．As | B．For | C．With | D．Through |
They are talking so warmly and it looks _________ they had been old friends.
| A．even if | B．if | C．as though | D．As |
I am busy now. _________ my brother do it for you?
| A．Will | B．Shall | C．Must | D．May |