单项选择题

A．Natural influences.
B．Red tide organisms.
C．Human activities.
D．Dead aquatic animals.
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单项选择题
A．He has some money to buy a new car.B．He fails in borrowing enough money from the woman.C．He will spend much money on his house.D．He wants to buy a new house and a new car.
A．He has some money to buy a new car.
B．He fails in borrowing enough money from the woman.
C．He will spend much money on his house.
D．He wants to buy a new house and a new car.
单项选择题
A．Our brain contract as we grow old.B．One part of the brain does not contract.C．Sixty-year olds have better brains than thirty-year olds.D．Some people’’s brains have contracted earlier than other people’’s.
A．Our brain contract as we grow old.
B．One part of the brain does not contract.
C．Sixty-year olds have better brains than thirty-year olds.
D．Some people’’s brains have contracted earlier than other people’’s.
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