The teacher gave some instructions. I don’t understand any of them.
A.The instructions the teacher gave are not understanding to me
B.It was the instructions the teacher gave that confused me
C.It hasn’t been clear to me about the constructions given
D.I’m finding it difficult to figure out what the teacher required according to his instructions

A.cafeteria
B.guarantee
C.significant
D.economics

A.examine
B.determine
C.undermine
D.discipline

According to the passage, carbon dioxide is stored in each of the following EXCEPT
A.polar ice caps.
B.sedimentary rocks.
C.rain forests.
D.fossil fuel.

Which of the following does the author NOT mention as a consequence of a large rise in global sea level?
A.The destruction of wetlands
B.The flooding of cities
C.A more diverse marine population
D.Severe storms

According to the passage, what is the relationship between carbon dioxide and the Earth’s climate?
A.Carbon dioxide, which is trapped in glacial ice, is released when warm temperatures cause the ice melt.
B.The greenhouse effect, which leads to the warming of the climate, is result of too much carbon stored in the Earth’s crust.
C.Rain causes carbon dioxide to be washed out of the atmosphere and into the ocean.
D.An increase in atmospheric carbon dioxide results in the warming of the climate.

The word massive can be replaced to
A.wide
B.huge
C.dense
D.thick

The word “this” in the third paragraph refers to
A.man’s upsetting the equation
B.the reduction of the level of carbon dioxide.
C.a volcanic eruption
D.the melting of the polar ice caps

What is the main topic of the passage?
A.The possibility that the popular ice caps will melt
B.The coming of another ice age
C.Man’s effect on the carbon dioxide level in the atmosphere
D.The climate of the Earth over the years

What does the passage mainly discussed?
A.art in 19th centuryAmerica
B.portraiture in 19th centuryAmerica
C.the early years of photography
D.the influence of other countries on American art