- A tornado is a rotating column of air rapidly whirling upward. A waterspout is a rotating column of water sucked up from a body of water by a whirlwind. Since the causes of tornadoes and waterspouts are almost the same, tornadoes can become waterspouts on crossing water and waterspouts can become tornadoes when
Your answer:
whirling upward.
crossing a lake.
crossing land.
crossing a whirlwind.
- I feel like the starving individual who was offered a meal only after losing every tooth. The prize has come to me
Your answer:
at an opportune time.
early in my career.
too late in life.
because of my success.
- There are no saber-toothed tigers today. After the disappearance of the other large animals that they fed on, these cats were unable to adjust to a radically different diet. After some centuries, they became
Your answer:
apes.
extinct.
hungry.
weak.
- The ancient Romans built many wonderful roads, which lasted centuries. The Romans made their roadbeds very deep--up to a depth of three meters, as compared to about two-thirds of a meter in our modern roads. The Romans believed that the Roman Empire would be eternal, and they wanted their roads to
Your answer:
last forever too.
be built quickly.
impress their conquerors.
be only temporary.
- Reading is often engaged in as relaxation and leaves the mind untouched. How much better to enjoy reading as a form of mental exercise! It can do more than pass idle time or help us to sleep; it can help us to think to the full limit of our ability; it can help us to
Your answer:
stay young.
be less interesting.
avoid grammatical errors.
grow strong mentally.
- You may think that climbing up a mountain is much more difficult than climbing back down. However, this is not usually the case. The descent is frequently
Your answer:
the easier part of the trip.
more interesting than the ascent.
not worth attempting at all.
the harder part of the trip.
- In several experimental studies, the new drug has been administered to human patients with this disease. As yet, too few studies have been carried out to prove beyond doubt the value of the drug although the results thus far have been
Your answer:
ignored.
impractical.
encouraging.
disappointing.
- I have yet to find an area of human knowledge that is unattractive to me. Each area that I have met has seemed to me inviting to
Your answer:
denounce.
forget.
explore.
ignore.
- Originally, an acre was the amount of land that a yoke of oxen could cultivate in one day. Farmers of long ago stated the size of their farms in terms of
Your answer:
their relation to a farm of standard size.
how long it took to harvest a crop.
the time required to cultivate them.
the number of oxen they owned.
- Farming in New England is made difficult by the rockiness of the land. Tillable fields must be cleared of boulders before cultivation can be undertaken; in some regions, successful farming is impossible because the soil about the underground shelf of rock is too
Your answer:
fertile.
level.
shallow.
exposed.