[单项选择]When a pencil is partly in a glass of water, it looks as if it ______.


A. breaks
B. has broken
C. were broken
D. had been broken

[单项选择]When a pencil is partly in a glass of water, it looks as if it（　）.
A. breaks
B. has broken
C. were broken
D. had been broken

[单选题]The reverse of evaporation is _______. It occurs when water vapor changes to a liquid, as when water drops form on a cool glass on a warm day.
A.melting
B.sublimation
C.condensation
D.freezing

[单项选择]Water, when boiled, always （）steam.
A. gives in
B. gives up
C. gives off
D. gives away

[单项选择]There is ______ water in the glass. I am going to get some.
A. much
B. many
C. little
D. a lot of

[单项选择]When you get a minor burn, pour some cold water on it, which will help _________ the pain of the burn.


A. relieve
B. relax
C. reveal
D. release

[单选题]Clouds, fog, or dew always form when water vapor _______ .
A.evaporates
B.melts
C.freezes
D.condenses

[单项选择]Why did Shaefer put the paper under glass


A. To make things as difficult as possible.
B. To stop the reflection of heat.
C. To prevent Rose from feeling the print.
D. To stop her from cheating.

[单项选择]The traffic police stopped three trucks heavily loading with merchandise that looked as grain bags.


A. that were loading... like
B. loaded with... like
C. to load with... for
D. loaded with... for

[单选题]_______ is the changing of liquid water to invisible water vapor.
A.Condensation
B.Evaporation
C.Sublimation
D.Melting

[单项选择]When in his rebellious years, that is when he was sixteen or eighteen, Frank Anderson （） going around with a strange set of people and staying our very late.
A. took to
B. took up
C. took on
D. took in

[单项选择]Annie's glass, I apologized to her.
A. To break
B. Breaking
C. Having broken
D. Break

[单选题]Water is present in the atmosphere in three states. Which word below is not used to define the states of water?
A.Ice
B.Solid
C.Liquid
D.Gas

[单项选择]

Passage One
The making of glass is a very old industry--at least 4,500 years old. Glass has many extraordinary qualities and it is frequently being used in new ways.
One of the most interesting new uses for glass is in telephone communication. Scientists have developed glass fibers as thin as human hair, which are designed to can-y light signals. When the light reaches the other end, it is first changed into electrical signals, which are in turn converted into sound messages.
Called light wave communication, the new system was used successfully in an experiment in Chicago in 1997. During the experiment, two glass fibers were able to carry 672 conversations at the same time. The lightwave cable, containing 144 glass fibers, has the capacity to carry 50,000 conversations at the same time.
The lightwave communication system has two important advantages. First, the glass fiber cables are smaller and weigh less than copper. Second, they cost less
A. has been put into actual use
B. was first put into actual use in 1977
C. had been repeatedly experimented on before 1977
D. was put on experiment in 1977

[单选题]_______ is the changing of ice directly to water vapor, or of water vapor to ice.
A.Sublimation
B.Condensation
C.Freezing
D.Melting

[单项选择]Childhood can be a time of great insecurity and loneliness, during which tile need to be accepted by peers ______ great significance.
A. takes on
B. works out
C. brings about
D. gives in