[单项选择]A surge in gun-safety classes is occurring as states relax laws regarding carrying guns.
A growing number of people—many of them women—are acquiring guns for self-protection, says Don Cates, a retired professor at the Saint Louis University School of Law who has studied the issue of gun control extensively.
Cares says increased interest from women is a significant factor. "Women used to be told that owning a gun is a man’s thing." Cates says. "That is not the case anymore because women are being told that they should be able to defend themselves."
The issue of gun rights has jumped back into the spotlight after two recent mass shootings—the July 20 assault on an Aurora. Colo., movie theater that killed 12 and Sunday’s attack on a Sikh temple in Wisconsin that left 7 dead, including the gunman.
To accommodate the increased number of students attending gun classes, the National Rifle Association has certified 5,000 additional instructors since April 2011, adding to th
A. has trained 5,000 gun instructors since April 2011
B. has witnessed a huge rise in gun-safety class attendance
C. has strongly opposed carrying guns in public
D. has assigned work to 150,000 gun instructors

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[单项选择]A surge in gun-safety classes is occurring as states relax laws regarding carrying guns.What does Cares say about the gun issue
A．The states have been forced to amend laws about carrying guns.
B．Women have raised awareness of self-protection with guns.
C．Increasing interest in guns has led to two serious shootings.
D．An increased number of women have attended gun-safety classes.

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Arsenic, a naturally occurring poison and carcinogen found in ground water, is strongly linked to adult-onset diabetes, U. S. researchers said on Tuesday. Odorless, tasteless, colorless and easily soluble in water or wine, arsenic has long been a feared poison. A heavy dose is detectable in a corpse, but researchers say small amounts of arsenic may sicken people gradually.
Dr. Ana Navas-Aeien and colleagues at Johns Hopkins University in Baltimore found a " relatively strong " association between commonly found levels of arsenic in urine and type 2 diabetes in a study of American adults. " It seems there is maybe no safe level of arsenic. " Navas-Acien said in a telephone interview. " Worldwide it’s a huge problem, " she said. " As water becomes a scarce resource. the situation becomes even more serious. "
Arsenic raises the risk for cancers of the bladder, lung, kidney, skin and, possibly, the pros tate, Navas-Acien s
A. smell
B. taste
C. poison
D. color

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