People born in winter are more likely to suffer mental health disorders, according to a recent study carried out by researchers at Vanderbilt University in Tennessee. Researchers raised baby mice from birth to weaning in either "summer" light cycles of 16 hours of light and 8 hours of dark or "winter" cycles of 8 hours of light and 16 hours of dark. A third group experienced 12 hours of light and 12 hours of dark a day. Then half the winter mice stayed in a winter cycle, while half switched to a summer schedule. The summer mice were similarly _ . The mice raised in equal periods of light and dark were split into three groups, one of which stayed on the 12hour schedule, one of which joined the winter group, and one of which joined the summer group. After 28 days, it turns out the summerborn mice behaved the same whether they stayed on the summer cycle or switched to winter. But among the winterborn mice, those stayed in winter kept their previous schedule, while those that switched to summer stayed active for an extra hour and a half, which indicates that mice born and weaned in a winter light cycle showed dramatic disruptions in their biological clocks. The finding is the first of its kind in mammals, and it could explain why people born in winter are at higher risk for mental health disorders including bipolar depression, schizophrenia and seasonal affective disorder. "We know that the biological clock regulates mood in humans,"said study researcher McMahon. "If the mechanism similar to the one that we found in mice operates in humans, then it could not only have an effect on a number of behavioral disorders, but also have a more general effect on personality." How many groups of mice are there finally in all in the experiment? A) Four. B) Five. C) Six. D) Seven.
D
She had been shopping with her Mom in Wal-Mart. She must have been 6 years old, this beautiful brown haired, freckle-faced image of innocence. It was pouring outside. We all stood there under the awning and just inside the door of the Wal-Mart. We all waited, some patiently, others irritated, because nature messed up their hurried day. I am always memorized by rainfall. I get lost in the sound and sight of the heavens washing away the dirt and dust of the world. Memories of running, splashing so carefree as a child come pouring in as a welcome reprieve from the worries of my day. Her voice was so sweet as it broke the trance we were all caught in, "Mom, let's run through the rain." she said. "What?" Mom asked. "Let's run through the rain!" She repeated. "No, honey. We'll wait until it slows down a bit." Mom replied. This young child waited about another minute and repeated: "Mom, let's run through the rain." "We'll get soaked if we do." Mom said. "No, we won't, Mom. That's not what you said this morning," the young girl said as she pulled her Mom's arm." "This morning? When did I say we could run through the rain and not get wet?" "Don't you remember? When you were talking to Daddy about his cancer, you said, if God can get us through this, he can get us through anything!" _ No one came or left in the next few minutes. Mom paused and thought for a moment about what she would say. Now some would laugh it off and scold her for being silly. Some might even ignore what was said. But this was a moment of affirmation in a young child's lifetime when innocent trust can be nurtured so that it will bloom into faith. "Honey, you are absolutely right. Let's run through the rain. If get wet, well maybe we just need washing." Mom said. Then off they ran. We all stood watching, smiling and laughing as they ran past the cars . They held their shopping bags over their heads just in case. They got soaked but they were followed by a few who screamed and laughed like children all the way to their cars. And yes, I did. I... What attitude of the Mom towards her daughter's suggestion at first? A) Indifferent B) Positive C) Negative D) Curious
C
*Question*
Lucy, whose skeleton was discovered in Ethiopia in 1974, died shortly after she fell out of a tree, according to a new study published Monday in the British journalNature. For their research, Kappelman and Dr. Richard Ketcham used a CT scanner to create more than 35,000 "slices" of Lucy's skeleton. Scientists named her Lucy from the Beatles song "Lucy in the Sky with Diamonds", which was played at the camp the night of her discovery. The following analysis of the slices showed sharp, clean breaks seen at the end of Lucy's right humerus are similar to bone breaks seen in victims of falls. The researchers concluded that these and other breaks in her skeleton show that Lucy, who is believed to have stood about 3 feet 6 inches and weighed about 60 pounds, fell feet first and used her arms to support herself -- but that the injury was too severe to have been survivable. The researchers estimate that Lucy was going about 35 miles an hour when she hit the ground after falling from a height of roughly 40 feet, according to the statement. That sounds _ . But other scientists are doubtful. "There are countless explanations for bone breaks," Dr, Donald C, Johanson, director of the Institute of Human Origins and one of the scientists who discovered Lucy, said, "The suggestion that she fell out of a tree is largely a just-so story and therefore unprovable." Johanson said it was more likely that Lucy's breaks occurred long after she died, saying that "elephant bones appear to have the same kind of breaks, It's unlikely they fell out of a tree. " But the new research focused on "a small number of breaks" that are consistent with "high-energy bone-to-bone influences" and which differ from the sorts of breaks commonly seen in other collected bones. Kappelman responded in an email, "These appear to have occurred at or near the time of death." What conclusion can we draw from the passage? A) Lucy didn't die from falling out of a tree. B) The newly published study was meaningless. C) The argument on how Lucy died will continue. D) Scientists will find another way to solve the problem.
**Answer**
C