_______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

_____(74)




A.meeting
B.taking
C.making
D.interviewing

Without skilful surgery he would not have survived the operation.




A.Had it been for skilful surgery he would not have survived the operation.
B.He wouldn't have survived the operation if he hadn't had skilful surgery.
C.But for skilful surgery he would not have survived the operation.
D.With skilful surgery he would have survived the operation.

The word "displaced" in the second paragraph is closest in meaning to __________




A.not pleased
B.moved
C.located
D.filtered