She will tell us why she feels so strongly that each of us has a role _____ in making the earth a better place to live.
| A．to have played | B．played | C．playing | D．to play |
In that month, he earned as much as, if ____ than, $40 000.
| A．no more | B．not more | C．no much | D．not much |
The problem is not _____ easy. Think _____ over.
| A．such, it | B．that, it | C．so,不填 | D．that，不填 |
It is so difficult a problem that _____ student in this class _____ work it out.
| A．any, can't | B．no, can | C．every, can | D．no, can't |
.Please make my excuse at tomorrow's meeting. I've got too much work _____.
| A．to do to come | B．doing coming | C．to do coming | D．doing to come |
Our math teacher, however, _____ speak English well.
| A．doing | B．does | C．is doing | D．was doing |