_____ of the students who took part in the military training is 450.
| A．A number | B．A lot | C．Lots | D．The number |
As young men，we should learn to stand up_________we fell．
| A．when | B．where |
| C．unless | D．if |
You may be out of your parents’________but never out of their mind wherever you are．
| A．sight | B．sign |
| C．sigh | D．scene |
The hard part in our life is not making the decision but living with_________．
| A．one | B．that |
| C．the one | D．it |
--How can I make progress in my study，Sir？
--_______ an effective learner，you should find some good approaches．
| A．Being | B．Having been |
| C．To have been | D．To be |
--- How many people attended the exhibition?
--- I’m not sure. __________ 100 people.
| A．Exactly | B．Actually |
| C．Roughly | D．Strictly |