单项选择题

A．Because the Earth is heavily polluted.
B．Because nature cannot recycle its resources.
C．Because there are more and more people living on the Earth.
D．Because no more new resources can be added.
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单项选择题
A．Those who have heart attacks.B．Those who have the desire to be physically fit.C．Those who have spare time.D．Those who have inactive jobs.
A．Those who have heart attacks.
B．Those who have the desire to be physically fit.
C．Those who have spare time.
D．Those who have inactive jobs.
单项选择题
A．He continues to look for other solutions to his problem.B．He decides to visit a doctor at his sister’s urging.C．Ha finally accepts that state of his condition.D．He shows doubts about the effect of drugs.
A．He continues to look for other solutions to his problem.
B．He decides to visit a doctor at his sister’s urging.
C．Ha finally accepts that state of his condition.
D．He shows doubts about the effect of drugs.
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