________ several times，he still couldn't understand how to operate the machine.
| A．Telling | B．Having told |
| C．To be told | D．Having been told |
--- Please don’t call me between 8 : 00 and 10: 00 when we will be having an important meeting.
---_ .
| A．Make it! |
| B．Got it！ |
| C．Take it! |
| D．Remember it！ |
No judgment _ about whether the man is guilty until the whole case has been investigated.
| A．will make |
| B．will be made |
| C．has made |
| D．has been made |
_ you can affect the life of your child in an active way, you have been a success.
| A．Even though |
| B．Unless |
| C．As long as |
| D．As though |
Not until he got to the classroom _ he had left his books in the dormitory.
| A．Martin realized |
| B．realized Martin |
| C．did Martin realize |
| D．had Martin realized |
I was shocked by the poor results of the exam, which made me realize _ _ terrible problems I would face.
| A．how |
| B．what |
| C．that |
| D．why |