单项选择题

A．Their taming for circuses and zoos.
B．The destruction of their natural homes.
C．Man’s lack of knowledge about their behavior.
D．The greater vulnerability to extinction than other species.
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单项选择题
A．He felt upset because of her failure.B．He believes she will pass the test this time.C．He is sure they will succeed in the next test.D．He did no better than the woman in the test.
A．He felt upset because of her failure.
B．He believes she will pass the test this time.
C．He is sure they will succeed in the next test.
D．He did no better than the woman in the test.
单项选择题
A．Put the homework on Don’s desk.B．Leave the master key for Don.C．Give Don’s students the next assignment.D．Call Don at the end of the afternoon.
A．Put the homework on Don’s desk.
B．Leave the master key for Don.
C．Give Don’s students the next assignment.
D．Call Don at the end of the afternoon.
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