单项选择题

A．The professor has got into trouble.
B．The woman regrets taking up much of Prof. Murphy’s time.
C．Prof. Murphy has trouble sleeping.
D．The woman knows Prof. Murphy has been busy.
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单项选择题
We need more people to _________ their blood because there are so many injured men and women in the disaster.
A．inject
B．denote
C．diagnose
D．donate
单项选择题
The Western custom of exchanging love on Valentine's Day has been introduced into China and is becoming popular among young people.
A．tokens
B．toll
C．transit
D．titles
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