—Come on，Kitty.
—Oh, good heavens! Both my legs are nearly to give out. I_______ for hours like a dog.
| A．have been walking | B．had walked | C．was walking | D．walked |
The President ________ that he would visit France the following month.
| A．deserved | B．confirmed | C．predicted | D．doubted |
The technical cooperation and cultural __________ between the two countries are daily on the increase.
| A．expenses | B．exchanges | C．exception | D．extension |
This is his only request that the room __________ after being used.
| A．be cleaned | B．would be cleaned |
| C．is cleaned | D．will be cleaned |
Speaking of what sort of smartness is most desirable in human __________，a friend of mine told me a story.
| A．conduct | B．experience | C．custom | D．habit |
We should __________ primary importance to job training.
| A．concentrate | B．devote | C．attach | D．emphasize |