In spite of the difficulties we always manage to pick up ourselves,for we___the end of difficulties
| A．are arriving at |
| B．have arrived |
| C．were arrived at |
| D．arrive at |
___ will conquer nature.
| A．The man | B．Man | C．A man | D．The man |
The president’s ____ is $300,000 a day.
| A．pay | B．salary | C．wage | D．money |
The little boy is clever.He has _____.
| A．brain | B．a brain | C．the brain | D．brains |
Biology is ____
| A．science of life | B．science of the life | C．the science of the life | D．the science of life |
“Theory is something, but practice is ___” said he.
| A．something | B．everything | C．nothing | D．anything |