What does the word It refer to?
A.Heat radiation
B.The glass of a greenhouse
C.A result of mankind's burning of fuels
D.Atmosphere

One thing that all atmospheric scientists apparently agree about is that ______.
A.greenhouse affects the earth's temperature significantly
B.global temperatures are never rising
C.the glass of greenhouses has reduced the need to burn fuel
D.the amount of carbon dioxide in the atmosphere is increasing

A.fabric
B.leather
C.affect
D.scatter

A.compost
B.package
C.bucket
D.device

Have you ever thought of an exciting trip to nowhere, a trip ................?
A.to the world
B.to the sea
C.to space
D.into the earth

If you decide to take the trip, you'll have............. a few months before the flight.
A.to get willing
B.to be hard
C.to get ready
D.to be unwilling

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the followings.
It was boring there. There was no TV or radio so we had to make our ______ for ourselves.
A.entertainment
B.entertain
C.entertaining
D.entertainingly

You must get a letter from the doctor that shows you are in perfect ..............
A.health
B.healthy
C.healthful
D.healthily

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the followings.
People should willingly ______a hand with saving the environment before it becomes too bad to live in.
A.do
B.have
C.give
D.put

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the followings.
Laura feels a strong ______of responsibility towards her employees.
A.emotion
B.feeling
C.sense
D.sentiment