单项选择题

Questions 14 ～ 17 are based on a talk by a speaker about butterflies. Who is the enemy of butterfly

A．Human kind.
B．Birds.
C．Polluted air.
D．Hot weather.
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单项选择题
Why does Mrs. Smith think that they have made the right decision
A．They feel comfortable to change the roles.
B．They are down-hearted after changing the roles.
C．They find it interesting to change the roles.
D．They are fired of doing their housework.
单项选择题
Why did Sue have to testify about the case
A．Because she was scared.
B．Because the robber was arrested
C．Because she lost her money.
D．Because the robber was killed.
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