The pronoun "it" in the fourth paragraph refers to______.

A．Only because it was an interesting work,

B．Because it was interesting work,

C．Only because it was interesting work,

D．Because it was only interested work,

A．they don"t want their citizens to know much other foreign countries

B．they think such freedom will lead to war

C．they often disagree with each other on important matters

D．they want to show their authority over communication

A．They still find it entirely a mystery.

B．They are able to explain how and why it works in theory.

C．They are rather skeptical about it.

D．They haven"t found satisfactory answers as to how it works.

A．Acupuncture is now practiced all over the world.

B．What makes acupuncture work can never be explained.

C．Western doctors are interested in traditional Chinese medical practices.

D．Acupuncture is used as widely as it was in ancient times.

A．They are trying to use it as a new way to treat disease.

B．They are trying to use it as an anesthesia in operation.

C．They are trying to use it to relieve pain.

D．They are trying to use it as a means to understand the human nervous system.

A．simple

B．very ancient

C．perfect

D．important

A．That was from Mike

B．It was Mike whom

C．It was from Mike that

D．It was Mike that

A．deprived

B．denied

C．reject

D．returnedza

A．by

B．for

C．to

D．in

A．with

B．by

C．into

D．of