_____ in thought, he sat at the edge of the bed, with his eyes _____ on the letter in his hand.
| A．Lost; fixing | B．Losing; fixed | C．Lost; fixed | D．Losing; fixing |
He told us whether _____ a picnic was still under discussion.
| A．to have | B．having | C．have | D．had |
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 |
Please do me a favor —_____ my friend Mr. Smith to Youth Theater at 7:30 tonight.
| A．to invite | B．inviting |
| C．invite | D．invited |
You and I could hardly work together, _____?
| A．could you | B．couldn’t I |
| C．couldn’t we | D．could we |
Do you consider it any good _____ psychology?
| A．to learn | B．to have learned |
| C．learning | D．having learned |