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Many parents watch the news or other shows as children play nearby. But new research shows that even when the television is just background noise，it may be disruptive to a child’s normal development.
It’s estimated that 75 percent of very young children in the United States live in homes where the television is on most of the time，even though the kids often aren’t watching it. The University of Massachusetts researchers recently studied how TV background noise might affect young children. The study looked at 50 1­，2­and 3­year­olds. Each child came to a lab with a parent and was allowed to play for an hour with various toys. For half the time，a television was on in the room，showing the adult game show as well as advertisements. During the other half hour，the TV was turned off.
As expected，the children paid little attention to the adult television show，glancing at it for less than a few seconds at a time，and less than once a minute. Even so，the distraction (分心) of the background noise had a significant effect on how children at every age played. When the television was on，the children played with each toy for far shorter periods of time，and focused attention during play was also shorter compared to how they played when the TV was off.
Researchers said that even though the children aren’t interested in the show，background TV affects their ability to do various types of play. The finding is important because many well­meaning parents who wouldn’t let their young children watch television may not realize that even adult programs that don’t interest children still can have an effect.
“Background TV is potentially a chronic (長期的) environmental risk factor affecting most American children，” said the lead author of the study. “Parents should limit their young children’s exposure (接觸)．”
小題1:We know from the passage that________.
A．background TV noise has little effect on adults
B．most young children in America live in homes exposed to TV noise
C．the effect of background TV noise on children is immediate
D．most parents in America wouldn’t let their children watch TV
小題2:The underlined word “disruptive” in Paragraph 1 is closest in meaning to________.
A．harmfulB．importantC．similar D．related
小題3:In the study，the children________.
A．were all 3­year­oldsB．were asked to watch adult TV shows
C．played for an hour while the TV was onD．played with more than one toy
小題4:What does the study show?
A．Children pay much attention to adult TV shows.
B．Children should be allowed to watch TV for kids only.
C．The background TV noise affects children’s ability to focus.
D．The more toys a child has，the shorter time he plays with each one.

小題1:B
小題2:A
小題3:D
小題4:C
孩子玩耍的時候，如果電視一直開著，即使他們不看電視節(jié)目，電視的聲音也會影響他們的注意力。
小題1:B 推斷題。根據It’s estimated that 75 percent of very young children in the United States live in homes where the television is on most of the time，even though the kids often aren’t watching it.可知答案為B。
小題2:A 猜測詞意題。根據第一段可知，讓孩子暴露在電視聲音下，對孩子有害，可知：答案為A。
小題3:D 推斷題。根據Each child came to a lab with a parent and was allowed to play for an hour with various toys.答案為D。
小題4:C 推斷題。根據the distraction (分心) of the background noise had a significant effect on how children at every age played.可知答案。
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Brown says she doesn’t mind handling panda poop. “It’s probably the most pleasant material to work with,” she says, “My colleagues and I have been working with other poop for a long time, and we can assure you it has a fairly pleasant smell associated with it.”
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A．to create a renewable energy from plants
B．to explore a new way to get energy from plants
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b. Find the bacteria in panda poop which break down bamboo.
c. Reproduce the chemicals in the lab to turn biomass into energy.
d. Analyze how the bacteria in panda poop work in panda’s stomach.
A. a, b, d, c          B. a, d, c, b          C. b, a, d, c          D. b, d, a, c
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