单项选择题

A good title for this passage is （）

A. Getting Blood arid Plasma
B. Special Blood and Colors
C. Human Blood Types
D. The Blood Bank of a Hospital

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A.nature B.candle C.danger D.stranger
单项选择题
Which position is best for Margaret Lillian who is 21 years old and would like a part time position to help her pay her university expenses She can only work in the evenings.（）

A. 1
B. 2
C. 3
D. 4
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