Hiện tượng mao dẫn:
A.Chỉ xảy ra khi ống mao đặt vuông góc với mặt thoáng của chất lỏng.
B.Chỉ xảy ra khi ống dẫn là ống thẳng.
C.Là hiện tượng chất lỏng trong những ống có tiết diện nhỏ được dâng lên hay hạ xuống so với mức chất lỏng bên ngoài ống.
D.Chỉ xảy ra khi chất làm ống mao dẫn không bị nước dính ướt.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
It’s unfair to blame the motor car _______ air pollution.
A.for
B.to
C.in
D.at

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Coal, oil and other similar _______ resources may eventually be replaced by solar energy.
A.nature’s
B.native
C.natural
D.nature

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Deforestation is one of the biggest environmental threats to the _______ 
A.emissions
B.ecological balance
C.carbon dioxide
D.carbon footprint

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The burning of fossil fuels is causing a shortage in natural _______.
A.assets
B.wealth
C.resources
D.supplies

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
If too many species _______ out, it will upset the ecosystem.
A.extinct
B.go
C.die
D.disappear

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
If we continue to _______ the world’s resources at this rate, there will soon be none left.
A.throw away
B.use up
C.finish
D.damage

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Factory _______ are the main cause of environmental pollution.
A.remissions
B.emissions
C.admissions
D.submissions

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Al Gore is leading a global _______ for environmental awareness.
A.operation
B.action
C.campaign
D.attack

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The problem has been _______ about by the increase in global warming.
A.brought
B.caused
C.thought
D.written