Tom kept quiet about the accident _______ lose his job.
| A．so as not to | B．so not as to | C．so as to not | D．not so as to |
So much progress ________ made in studies that he is sure to pass the coming examination.
| A．is he | B．has he | C．he is | D．he has |
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 |
Some of you may have finished Unit One.________，you can go on to Unit Two.
| A．If you may | B．If you do |
| C．If not | D．If so |
The young ________ the hope of our country.
| A．is | B．are | C．were | D．was |
Little ________ that we were watching his every move，so he seemed to be going his own way in this business.
| A．he realized | B．he didn't realize |
| C．didn't he realize | D．did he realize |