I was shocked by the number of people who seemed to have nothing better to do with their timethan ______ to know fish better.

Not all birds can fly , ______ do all birds build nests.

When you fall in love for the first time, it ’s surprising ______inconveniences you can put upwith.

I know my limitations, so I won ’t do anything ______ my ability.

The hosts apologized for ______ that some of their guests might be vegetarians.

Mrs. Smith locked both the front and the back doors before she went to bed______thatsomeone might steal into the house at night.

We have to wait for the bus, ______?

______ the popularity of robots in Japan, the country ’s robot-production growth is slowing down.

The proposal deserves support as it gives ______ to the needs of children.

Those familiar with evening dress will always ______ black with elegance.

If you’re sitting around a lonely campfire at night, the howl of a wolf can sound pretty______.

The suspect cooperated fully with the police when ______ about his role in the incident.

Homing pigeon is useful as a ______ carrier because when taken from home, it will return atthe first opportunity.

One of the responsibilities of the Coast Guard is to make sure that all ships______followtraffic rules in busy harbors.

She was so ______ the noise that she sent the children to bed.

Mr. Johnson ______ rather not invest that money in the stock market.

Americans eat ______ vegetables per person today as they did in 1910.

In 1900, the energy derived from burning petroleum was only four percent ______ of coal.

Many patients insist on having watches with them in hospital, ______ they have no schedules to keep.

In summer, she would sit in the garden enjoying the fresh air and the smell of the things she ______.

There ______ nothing more for discussion, the meeting ended earlier than expected.

______ we can hope for is to avoid complete failure in the coming game with that strong team.

While crossing the mountain area, all the men carried guns lest they ______ by wild animals.

Her talent and experience ______ her to the respect of her colleagues.

Those who change mobile phones too frequently will have to pay for being ______.

We hoped to be able to move into our new house at the end of the month, but things didn ’t ______ as we expected.

On arriving home, the boy told his parents about all the ______ which occurred in his dormitory.

He complained to the bookseller that there were several pages ______ in the book.

Jeans are so hot these days that big name stars appear on TV advertising for their ______ brands.

In order to buy a new car, you should at least ______ one hundred dollars a week.

Without transportation, there could be no trade. Without trade, there could be no towns and cities. Towns and cities are traditionally the ___16___ of civilization. Therefore, transportation helps make civilization ___17___ .  Throughout most of the prehistoric period, people lived by hunting, fishing, and ___18___ wild plants. They had no beasts of burden, wheeled vehicles, or roads. People traveled ___19___ and carried their infants and belongings strapped to their backs or heads. Loads too heavy for one person to carry were strapped to a pole and carried by two people.  The wheel was invented about 3500 B.C. and sailboat about 3200 B.C. Wheeled vehicles and sailing vessels ___28___transportation. But the speed of transportation improved only ___29___ over the centuries. Inventors produced the first engine- ___30___ vehicles during the late 1700’ s and the early 1800’ s. This development marked the beginning of a revolution in transportation that has continued to the present.  16. A. highlights B. pinpoints C. headquarters D. centers 17. A. possible B. acceptable C. practical D. typical 18. A. growing B. gathering C. watering D. moving 19. A. in turn B. at ease C. on foot D. for fun 20. A. All the while B. For a while C. In time D. On time 21. A. temporary B. permanent C. regular D. steady 22 A. knowledge B. judgment C. standards D. means 23. A. recognize B. develop C. meet D. reduce 24. A. bear B. move C. share D. lift 25. A. materials B. styles C. items D. types 26. A. where B. when C. how D. as 27. A. poles B. sails C. currents D. winds 28. A. demonstrated B. revolutionized C. witnessed D. initiated 29. A. considerably B. continuously C. swiftly D. slightly 30. A. powered B. controlled C. oriented D. related