[简答题]Wild birds and their eggs have been (at least) incidental sources of food for humans (since) prehistoric times and they (still) are in (most of) societies.

[简答题]There must have been a special sale on eggs that day because there was an impressive display of eggs in dozen and half-dozen cartons.

[简答题]The results have been encouraging： more sleep, increased attendance, better grades and fewer driving accidents.

[单项选择]（　）, wild dogs have very keen(灵敏的)senses of sight, hearing, and smell.
A. Like the cats
B. Cats are like
C. Although the cats like
D. They are like the cats

[单项选择]Wherever people have been, they have left waste behind, which can cause all sorts of problems. Waste often stinks, attracts vermin and creates eyesores. More seriously, it can release harmful chemicals into the soil and water when dumped, or into the air when burned. And then there are some really nasty forms of industrial waste, such as spent nuclear fuel, for which no universally accepted disposal methods’ have thus far been developed.
Yet many also see waste as an opportunity. Getting rid of it all has become a huge global business. Rich countries spend some $120 billion a year disposing of their municipal waste alone and another $150 billion on industrial waste. The amount of waste that countries produce tends to grow in tandem with their economies, and especially with the rate of urbanization. So waste firms see a rich future in places such as China, India and Brazil, which at present spend only about $5 billion a year collecting and treating their municipal waste.
Waste
A. Waste is everywhere.
B. Waste is very harmful.
C. Waste should be treated universally.
D. Waste can be an opportunity.

[单项选择]Children have been said to have brain-injured child syndrome, hyperactive (极度活跃的) child syndrome and attention-deficit disorder (ADD). As early as the 1940’s, psychiatrists have (62) children with hyperactivity and extremely distracted and impulsive. These frequent name changes show how (63) researchers are about the causes of the problem and the diagnostic (诊断的) (64) for the disorders.
In the past several years, the people who study attention deficit hyperactivity disorder (ADHD) have (65) to clarify the disorder’s causes and (66) , and have reasons to believe that it may be (67) . Today’s view on this disorder is very different from the beliefs of just a few years ago.
Researchers are finding that ADHD is not a disorder of just attention, but is from a developmental (68) in the brain’s circuitry and self-control. The loss of self-control (69) other important brain functions compulsory
A. effected
B. affected
C. conceived
D. endeavored