—Tom,did you break the vase I bought yesterday?
—It was not my .The floor was so slippery that I fell down and knocked it off the table.
| A．mistake | B．duty |
| C．fault | D．problem |
He returned from a long journey，________．
| A．exhaust | B．exhausted |
| C．to exhaust | D．exhausting |
Teachers should keep students________a distance，but not ________the distance.
| A．at；in | B．in；in |
| C．at；at | D．in；at |
________by his words，all the audience clapped now and then until his address came to an end.
| A．Impressed | B．Impressing |
| C．To be impressed | D．Having impressed |
The train went round and was soon________．
| A．out of order | B．out of sight |
| C．lose sight of | D．catch sight of |
It is ________to protect the traditional culture.
| A．importantly | B．of great importance |
| C．of very importance | D．of important |