He was puzzled by this phenomenon. He began to try every approach _________ the best way of working it out.
| A．known to find | B．knowing to find | C．known finding | D．knowing finding |
The computer was used in teaching. As a result, not only , but students became more interested in the lessons.
| A．saved was teachers’ energy | B．was teachers’ energy saved |
| C．teachers’ energy was saved | D．was saved teachers’ energy |
Edward, you play so well. But I you played the piano.
| A．didn’t know | B．hadn’t known |
| C．don’t know | D．haven’t known |
－It looks heavy. Can I give you a hand?
－ .
| A．No, thanks | B．Yes, my pleasure |
| C．No, never mind | D．Yes, I do |
They drove along with all the car windows ________.
| A．wound up | B．winding on | C．winded up | D．wind up |
________, I have to put it away and focus my attention on study this week．
| A．However the story is amusing | B．No matter amusing the story is |
| C．However amusing the story is | D．No matter how the story is amusing． |