单项选择题

A．Because there was enough blood stored in the city blood bank
B．Because most people were instantly killed
C．Because New Yorkers felt hesitant to offer their blood.
D．Because the NY authorities demanded the local citizens not to provide their blood.

A.Because
B.Because
C.Because
D.
D．Because
E.
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单项选择题
A．Because it symbolizes virginity.B．Because it represents hope.C．Because it signifies joy.D．Because it looks pure and beautiful.
A.Because
B.
B．Because
C.
C．Because
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D．Because
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单项选择题
A．Because she wanted to save money for her marriage.B．Because her boyfriend persuaded her to give up smoking.C．Because second-hand smoking was mining her daughter's health.D．Because she was going to have a baby.
A.Because
B.
B．Because
C.
C．Because
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