The word "preserve" is closest in meaning to _______




A.encourage
B.maintain
C.attain
D.reflect

It's impossible to cross the road because of the traffic.




A.The traffic makes people be impossible to cross the road
B.The traffic makes it be impossible to cross the road.
C.The traffic makes it impossible to cross the road.
D.The traffic makes every one be impossible to cross the road.

Why did he object so strongly _______ your proposal?




A.on
B.to
C.for
D.with

_______appears considerably larger at the horizon than it does overhead is merely an optical illusion.




A.That the Moon
B.The Moon which
C.The Moon
D.When the Moon

Not until _______________himself serious ill.




A.did he complete the task he had found
B.had he completed the task did he find
C.he completed the task did he find
D.he had completed the task did he find

For which of the following does the author NOT provide a scientific example in the third paragraph?




A.A lighthouse made of steel
B.A lighthouse shaped like a pyramid
C.A lighthouse with day-marker patterns
D.A lighthouse that resembles a house on a platform

According to the passage, a catoptric apparatus is one that uses _______.




A.a radio beacon
B.metal
C.glass
D.lights of various colors

______(68)




A.than
B.more
C.over
D.above

What can be inferred about the use of geothermal energy in Iceland?




A.It is not effective for use in private homes.
B.It is 80 times more effective than traditional forms of energy.
C.It is widely used form of energy for heating homes.
D.Twenty percent of the geothermal energy created is used to heat businesses.

The word "sluggish" is closest in meaning to __________.




A.very weak
B.slow moving
C.confused
D.nervous