___, I think, and the problems could be settled.
| A.If you double your efforts | B.So long as you keep up your spirits |
| C.Making greater efforts | D.A bit more efforts |
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 |