A. Because nothing remains on land except floods.
B. Because there are no longer trees to keep the rain and protect the top-soil.
C. Because too much rain sinks in and washes away the top-soil.
D. Because roots of the trees break up the soil.
A. How trees help prevent droughts and floods.
B. The relationship between trees and man.
C. How an empire fell to pieces in ancient times.
D. A story of trees.
A. From 1929 to 1933, 50% of the American population lived in poverty.
B. Where there is prosperity, there is poverty.
C.Poverty basically refers to a lack of clothing, housing and food.
D. Anyone with an annual income around the 1992 American poverty line would be considered wealthy.
A. the novel will
B. will the novel
C. is the novel
D. the novel is
A. of you to say so
B. for you to say so
C. of you saying so
D. for you saying so
A. calendar
B. column
C. schedule
D. diagram
A. In some cases
B. In that case
C. In case
D. In any case
A. for
B. to
C. with
D. and
A)carpet B)mined C)captured D)mounted
A) is larger than before B) is biggest now
C) are larger than ever D) as larger as before.
A)to be kept waiting B)being kept waiting C)to be kept to wait D)being kept to wait
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