To our surprise, the painting considered______ should have won the prize.
| A．being copied | B．having been copied |
| C．to have copied | D．to have been copied |
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 |
We're leaving at six o'clock , and hope _____ most of the journey by lunch time .
| A．to do | B．to have done | C．to make | D．to have made |