__________ of the students who took part in the military training is 450.
| A．A number | B．A lot | C．Lots | D．The number |
To stay awake, my brother finished a cup of coffee and ordered.
| A．the other | B．another | C．the others | D．other |
We use human translators rather than machines as we believe human persons are more.
| A．beneficial | B．sensitive | C．reliable | D．valuable |
The human mind can many tasks that other animals cannot, like using language and judging what other people are thinking．
| A．carry out | B．take out | C．put out | D．bring out |
It is a difficult problem for high school studentsthey can properly use the Internet．
| A．what | B．where | C．when | D．whether |
Many countries are now setting up national parks _animals and plants can be protected.
| A．which | B．whose | C．when | D．where |