单项选择题

A．The influence of coffee on the heart.
B．What kind of gene is beneficial to people.
C．How to find out what gene one has.
D．How many cups of coffee people should have each day.
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单项选择题
A．His paycheck is late.B．The book bag is too expensive.C．He can’t lend the woman any money.D．The woman doesn’t need a new book bag.
A．His paycheck is late.
B．The book bag is too expensive.
C．He can’t lend the woman any money.
D．The woman doesn’t need a new book bag.
填空题
Lisa Perez was always optimistic during the period of her unemployment.
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