He is a man of few words, and seldom speaks until _______ to.
| A．spoken | B．speaking |
| C．speak | D．be spoken |
The little girl couldn’t ________ the problem. She wasn’t ________ clever.
| A．get through, very | B．make out, much |
| C．work out, that | D．get across, so |
---Mike must have known that.
---No, he ________. How _______ he?
| A．mustn’t, must | B．may not, might | C．couldn’t, can | D．needn’t, need |
All the essays _____________, the teacher sent the students home.
| A．having written and collected | B．having been written and collected |
| C．being written and collected | D．to be written and collected |
---I was trying to carry out the plan, but I failed.
---Well, you _________, for we were uncertain it would do ________.
| A．needn’t do that, in fact | B．needn’t have done, in effect |
| C．needn’t have, in practice | D．needn’t, in time |
Up till now, full use of this theory has been ________ in building large ocean-going ships.
| A．done | B．made | C．laid | D．taken |