Mr. Smith sold that magnificent cottage of his on the sea __________2,000,000 dollars.
| A．at | B．for | C．to | D．by |
He was reading a very interesting story, completely_______himself in the story.
| A．lost | B．being lost | C．to be lost | D．losing |
Whoever invented _______wheel is believed to have made ______most useful invention in _______history.
| A．a; the; / | B．the; the; / | C．the; a; / | D．a; a; the |
The importance of saving gas_______be stressed too much. Automobiles use up some 70 billion gallons of gas a year.
| A．can’t | B．mustn’t | C．shouldn’t | D．may not |
Every day the boy, together with his classmates,_______to go to the sports ground and______football, _________themselves.
| A．are noticed; play; enjoying | B．is noticed; plays; enjoying |
| C．are noticed; plays; enjoys | D．is noticed; play; enjoying |
---The frequent terrible coal mine accidents killed more than 1,000 people in China last year.
---_______.
| A．Quite OK | B．Certainly | C．That’s the case | D．I agree |