The Great Wall is more than 6000 li in _________.
| A．longer | B．length |
| C．long | D．Longing |
Many people are still in_____ habit of writing silly things in _____ public places.
| A．the; the | B．/;/ | C．the; / | D．/; the |
Niagara Fall is a great tourist ________, drawing millions of visitors every year.
| A．attention | B．attraction | C．appointment | D．arrangement |
The children were warned of not being too_________about things they are not supposed to know.
| A．strange | B．amusing | C．curious | D．satisfied |
--- I regret ________ you that John has been fired.
--- I can hardly believe my ears. He is such a fine worker.
| A．telling | B．having told | C．to tell | D．to have told |
This is the first time we ________ a film in the cinema together as a family.
| A．see | B．had seen | C．saw | D．have seen |