题目内容：

    Technology offers conveniences such as opening the garage door from your car or changing the television station without touching the TV.

Now one American company is offering its employees a new convenience: a microchip implanted (植入) in their hands. Employees who have these chips can do all kinds of things just by waving their hands. Three Square Market is offering to implant microchips in all of their employees for free. Each chip costs $300 and Three Square Market will pay for the chip. Employees can volunteer to have the chips implanted in their hands. About 50 out of 80 employees have chosen to do so. The president of the company, his wife and their children are also getting chips implanted in their hands.

The chip is about the size of a grain of rice. Implanting the chip only takes about a second and is said to hurt only very briefly. The chips go under the skin between the thumb and forefinger. With a chip in the hand, a person can enter the office building, buy food, sign into computers and more, simply by waving that hand near a scanner. The chips will be also used to identify employees. Employees who want convenience, but do not want to have a microchip implanted under their skin, can wear a wristband (腕带) or a ring with a chip instead. They can perform the same tasks with a wave of their hands as if they had an implanted chip.

Three Square Market is the first company in the United States to offer to implant chips in its employees. Epicenter, a company in Sweden, has been implanting chips in its employees for a while.

Three Square Market says the chip cannot track the employees. The company says scanners can read the chips only when they are within a few inches of them. “The chips protect against identity theft, similar, to credit cards.” The U.S. Food and Drug Administration approved the chips back in 2004，so they should be safe for humans, according to the company.

In the future, people with the chips may be able to do more with them, even outside the office. Todd Westby is Chief Executive Officer of Three Square Market. He says, “Eventually, this technology will become standardized allowing you to use this as your passport, public transit, all purchasing opportunities, etc.”

1.What is the third paragraph mainly about?

A. The substitutes of the chips.

B. The advantages of the chips.

C. The places to implant the chips.

D. The potential risks of implanting the chips.

2.What does the underlined word “them” in Paragraph 5 refer to?

A. the hands B. the employees

C. the scanners D. the credit cards

3.We can infer that ________.

A. the chips have magic powers

B. the chips are very popular among the employees

C. the price of the chips is reasonable

D. most people suspect the application of the chips

4.Which of the following best describes Todd Westby’s attitude towards the chips?

A. Defensive. B. Disappointing.

C. Optimistic. D. Casual.