Some insects_____ the colour of their surroundings (环境) to protect themselves.
| A．take up | B．take off | C．take on | D．take out |
Because of the poor harvest, wheat prices have _____ in the last six months.
| A．added | B．jumped | C．amounted | D．developed |
I can't advise you what to do. You must use your own _____.
| A．opinion | B．guesswork | C．justice | D．judgment |
Tell your brother to come _____, because it's going to rain in a minute or two.
| A．indoors | B．outdoors | C．outward | D．inwards |
A successful scientist needs _____ if he wants to make hypothesis (假设) of how processes work and how events take place.
| A．permission | B．penetration | C．imagination | D．convention |
This year the farmers were just able to gather in the _____ before the fine weather came to an end.
| A．collection | B．harvest | C．flower | D．plant |