Some insects________the colour of their surroundings to protect themselves.
| A．take in | B．take off | C．take on | D．take out |
The book seems to have been _____ from various books and articles.
| A．pieced together | B．taken off | C．broken away | D．pulled out |
As more and more cars are produced and used, so the _____ from their exhaust-pipes contains an even larger volume of poisonous gas.
| A．exposure | B．distribution | C．expansion | D．emission |
He left in such a hurry that I _____ had time to thank him.
| A．almost | B．even | C．nearly | D．scarcely |
There are usually at least two _____ of looking at every question.
| A．ways | B．directions | C．views | D．opinions |
It is not profitable to provide bus services in districts where the population is widely _____.
| A．scattered | B．dismissed | C．separated | D．spread |