单项选择题

Which of the following about Internet is true according to the passage

A．The Internet is the greatest progress for this century.
B．Efforts are needed to control Internet.
C．Paraguay refused to sign a treaty for transmission.
D．The United Nations has found ways to prevent Internet from developing.

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单项选择题

What kind of film does the author dislike

A．Violent films.
B．Comedy.
C．European films.
D．Films acted by Leonardo.

单项选择题

According to Leszezynski, how does mobile phone affect one's health

A．Mobile phone radiation can increase protein activities and such activities can make the protective shield more permeable.
B．Mobile phone radiation can shrink the blood vessels and prevent blood from flowing smoothly.
C．Mobile phone radiation will bring stress to people exposed to it.
D．Mobile phone radiation kills blood cells at a rapid speed.