单项选择题

Questions 27-30

A．Conducting surgery on the tree.
B．Catching a fruit bat up a tree.
C．Cutting trees on an island.
D．Climbing a skyscraper.
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单项选择题
According to Dr. Brian Baker, ______.
A．people with heart trouble should get married
B．a harmonious marriage is beneficial for heart health
C．healthy hearts are a result of happy marriages
D．the sound of wedding bells can soothe troubled hearts
单项选择题
A．The walls of a shower room can be made of straw.B．Extractor fans can be fitted on a straw wall.C．Straw can breathe naturally by itself.D．The straw wall looks exactly like a normal wall, with no straw showing anywhere.
A．The walls of a shower room can be made of straw.
B．Extractor fans can be fitted on a straw wall.
C．Straw can "breathe" naturally by itself.
D．The straw wall looks exactly like a normal wall, with no straw showing anywhere.
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