单项选择题

There is a(n) ______ of a thousand pounds offered for the capture of the murderer.

A. reward
B. prize
C. award
D. credit
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填空题
Vitamin D is important for health and (11) . It is used by the body to form strong bones and teeth. That is why growing children need it. Vitamin D is called the (12) vitamin. It forms when the skin is bared to the sun. Long before people knew what vitamin D was, they learned that sunshine was important. Poor children lived in (13) slums. And they were often ill with rickets (软骨病). Rickets is a children’s disease caused by (14) vitamin D provided by sunshine, fresh milk, etc. It makes the bones become (15) and bent. In England a tax was once placed on windows. Builders put few windows in houses. Rickets became so common that it was called the English disease.
单项选择题
A. Yes, all right. B. Class is over now.C. How time flies! D. Yes, let’s hurry.
A. Yes, all right.
B. Class is over now.
C. How time flies!
D. Yes, let’s hurry.
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