题目内容：

The legal age for smoking in Japan is 20 and as the country' s 570,000 tobacco vending machines ( 自动售货机) prepare for a July regulation requiring them to ensure buyers are not minors, a company has developed a ______ to identify age by studying facial features.

By having the customer look into a digital camera ______ to the machine, Fujitaka Co's system will ______ facial characteristics, such as wrinkles surrounding the eyes, bone structure and skin sags (松弛), to the facial data of over 100,000 people, Hajime Yamamoto, a company spokesman said.

"With face ______ , so long as you've got some change and you are an adult, you can buy cigarettes like before. The problem of ______ borrowing (identification) cards to purchase cigarettes could be ______ as well," Yamamoto said.

But due to concerns about its accuracy, the facial identification method has yet to be ______ .

Yamamoto said the system could ______ identify about 90 percent of the ______ ,  with the remaining 10 percent sent to a "grey zone" for minors that look ______ , and baby-faced adults, where they would be asked to insert their driving license.

1.A. system    B. machine    C. program    D. monitor

2.A. added    B. attached    C. covered    D. devoted

3.A. prefer    B. adjust    C. lead    D. compare

4.A. features    B. structure    C. recognition    D. expression

5.A. students    B. youths    C. adults    D. minors

6.A. avoided    B. clarified    C. raised    D. improved

7.A. corrected    B. approved    C. updated    D. spread

8.A. completely    B. correctly    C. specifically    D. partly

9.A. smokers    B. sellers    C. lookers-on    D. users

10.A. older    B. younger    C. wiser    D. nicer