题目内容
When ______ from milk, the remainder is called skim milk.
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________.. including climate, mineral content, and the permanency of surface water, wetlands may be mossy ,grassy, scrubby, or wooded.
The modern automobile is a composed of more than 14,000 parts.
Though a respected educator, Alexander Graham Bell ______ the inventor of the telephone.
The Medicare program (was established) in 1965 to (helping) elderly United States (citizens pay) the increasing (cost of) health care.
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