From the earliest times men seem to have noticed the habits of insects, and to have learnt lessons from them. Ants and bees work very hard during the summer, ____ enough food to last during the winter. They give us a good example to ____. If we waste time when the conditions are good for work, we shall probably ____ later and when we really want to work, we are ____ to do so.
Moths, and some other insects, cannot help flying towards a light of any kind. The attraction seems to be too strong for them. ____, they often ____ themselves by flying into something that is burning, such as a lighted candle. In some countries, when such insects as flying ants become a nuisance(讨厌的东西), people ____ themselves by lighting fires at the doors of their cottages. Sometimes the insects fly into the fire in such large ____ that they put it out. In literature we often find poets warning us of the danger of being attracted by ____ or beautiful things that will destroy us.
Butterflies are admired for their ____, though they receive very little praise for anything else. They fly ____ in the sunshine, going from flower to flower, happy all day long, leading a life of ____. They are beautiful, but it seems that they are not of much ____ use to anybody. Some human beings lead very much the same sort of life ____ they are butterflies of society.
Locusts are ____, though. They are active enough. They spend their time eating the food of others. ___ there are men like this, destroying things wherever they go, taking for themselves ____ belongs to others, using up everything and ____ nothing. They are human ____.
Perhaps it may be said that even the worst insects have one use: they ____ us not to be like them.
A. raising  B. picking   C. collecting  D. growing
A. learn  B. copy   C. set    D. accept
A. work   B. realize   C. suffer   D. miss
A. anxious  B. unnecessary C. nervous   D. unable
A. As a result     B. After allC. In the meanwhile   D. What's more
A. destroy  B. heat   C. devote   D. kill
A. prevent  B. keep   C. protect   D. escape
A. teams  B. numbers   C. groups   D. lines
A. bright  B. burning   C. firing   D. lighting
A. colour  B. attraction  C. beauty   D. work
A. about  B. up    C. down   D. high
A. happiness B. pleasure  C. business  D. value
A. real  B. true   C. proper   D. right
A. but   B. and    C. or    D. though
A. different B. similar   C. interesting D. exciting
A. Luckily B. Generally  C. Unfortunately D. Usually
A. that  B. which   C. all    D. what
A. preparing B. making   C. storing   D. producing
A. locusts B. moths   C. enemies   D. butterflies.
A. tell  B. suggest   C. warn   D. ask