--- We really enjoyed ourselves at the party. Thanks again, Mr and Mrs Johnson.
---____. Just drop in whenever you feel like it.
| A．With pleasure | B．Our great honor |
| C．Nice to meet you here | D．Nice having met you here |
---The air would certainly be cleaner if there were fewer cars running in the city.
---_______.
| A．How do you find it ? | B．How are you getting on ? |
| C．That’s a good point. | D．I managed somehow. |
_________, I always feel I want a few more days.
| A．However long is a vacation | B．However long a vacation is |
| C．However is a vacation long | D．However a vacation is long |
---How do you find my composition, Mr John?
---Good, ___too many spelling mistakes. You can’t imagine what great difficulty I had ___them.
| A．except, correct | B．except for, to correct |
| C．except, correcting | D．except for, correcting |
He is only too ready to help others, seldom, _____, refusing them when they turn to him.
| A．if not | B． if ever | C．if any | D．if so |
It is in their ability to speak ______ humans ______ from animals.
| A．which; differ | B．that; different | C．which; different | D．that; differ |