单项选择题

A．Because every species becomes extinct.
B．Because humans beings are powerful enough to kill other species.
C．Because of over-population.
D．Because human being is still a young species though it is exploiting the environment.
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单项选择题
A．A third.B．Almost half.C．Less than three-fifths.D．More than three-fifths.
A．A third.
B．Almost half.
C．Less than three-fifths.
D．More than three-fifths.
单项选择题
A．He is satisfied with present relations between home and school.B．He feels that the traditional program in mathematics is slightly superior to the developmental program.C．He believes that schools are lacking in guidance personnel.D．He feels that parent-teacher interviews can be made much more constructive than they are at present.
A．He is satisfied with present relations between home and school.
B．He feels that the traditional program in mathematics is slightly superior to the developmental program.
C．He believes that schools are lacking in guidance personnel.
D．He feels that parent-teacher interviews can be made much more constructive than they are at present.
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