单项选择题

A．Species protection methods are effective.
B．More people are changing their behavior.
C．New energy substitutes are found for future use.
D．The whole population of birds is increasing.
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单项选择题
A．She feels embarrassed when speaking in public.B．Her presentation receives a poor grade.C．She has not completed her assignment.D．She is unable to attend her psychology class.
A．She feels embarrassed when speaking in public.
B．Her presentation receives a poor grade.
C．She has not completed her assignment.
D．She is unable to attend her psychology class.
单项选择题
A．It has threatened the normal life of other animals.B．It s an example of victims of habitat destruction.C．It s the most special sea life in these two countries.D．It has totally disappeared from these two countries.
A．It has threatened the normal life of other animals.
B．It"s an example of victims of habitat destruction.
C．It"s the most special sea life in these two countries.
D．It has totally disappeared from these two countries.
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