The author organizes the discussion of the different types of fog according to ______.
A.their relative density
B.their relative frequency
C.the types of problems they cause
D.their geographic locations

Which is NOT true of the frontal fog?
A.It forms when two fronts of different temperatures meet.
B.The air is soaked.
C.It is quite common.
D.The warm front has rain falling into the colder front.

It can be inferred from the passage that the Labrador Current is______.
A.warm
B.cold
C.weak
D.polluted

Most people get fewer colds in the summer than in the winter.
A.A person is more likely to get a cold in the winter than in the summer.
B.The winter is much colder than the summer.
C.More people have summer colds than winter colds.
D.People get colder in the summer than in the winter.

The meeting was put off because of pressure of time.
A.The meeting was planned to start late because of time pressure.
B.The meeting started earlier because people wanted to leave early.
C.The meeting lasted much longer than usual.
D.There was not enough time to hold the meeting.

If it hadn't been for his carelessness, we would have finished the work.
A.Because he wasn't careless, we didn't finish the work.
B.If he had been more careful, we would have completed the work.
C.If her were careful, we would finish the work.
D.He was careless because he hadn't finished the work.

_______(44)
A.preservation
B.reservation
C.retention
D.conservation

The word "Here" in line 7 refers to __________ .
A.interpersonal interactions
B.the tone
C.ideas and feelings
D.words chosen

Why does the author mention "artistic, political, or pedagogic communication" in line 11-12?
A.As examples of public performance
B.As examples of basic styles of communication
C.To contrast them to singing
D.To introduce the idea of self-image

What does the passage mainly discuss?
A.Communication styles
B.The connection between voice and personality
C.The production of speech
D.The function of the voice in performance