题目内容

________.. including climate, mineral content, and the permanency of surface water, wetlands may be mossy ,grassy, scrubby, or wooded.

A. Depending on many factors
B. Many factors depending on
C. Factors depending on many
D. On many factors depending

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The modern automobile is a composed of more than 14,000 parts.

A. complex technical system
B. system of complex technical
C. complex technical system that
D. system is technically complex.

Though a respected educator, Alexander Graham Bell ______ the inventor of the telephone.

A. as is best known
B. best known as is
C. is best known as
D. best is known as

The Medicare program (was established) in 1965 to (helping) elderly United States (citizens pay) the increasing (cost of) health care.

A. was established
B. helping
C. citizens pay
D. cost of

The Buffalo River in Arkansas was designated ______ in 1972.

A. a national river and
B. which a national river
C. a national river
D. being a national river

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