Electric trains have now ______ steam ones in most countries in the world.
| A．took the place of | B．in place of | C．taken the place of | D．instead of |
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 |
36. 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 |
Lack of money led the company to a situation _____ they had to decide whether they should keep on with their production.
| A．when | B．where | C．that | D．which |