题目内容：
Doctors often use drugs such as endorphins to treat patients．
参考答案：
答案解析：
单选题：Doctors often use drugs such as endorphins to treat patient
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- 题目类型：单选题
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There is an abundant supply of cheap labor in this country.
There is an abundant supply of cheap labor in this country.A a steadyB a ple
A．for B．in C．with Don
A．for B．in C．with Don
A．take B．contribute C．engage D．devote
A．take B．contribute C．engage D．devote
Our lives are intimately bound up with theirs.A tensely B
Our lives are intimately bound up with theirs.A tensely B nearly C careful
He made a suggestion that they (visit)______________their f
He made a suggestion that they (visit)______________their friends in New York.