单项选择题

A．It was applaudable.
B．It was just terrible.
C．The actors were enthusiastic.
D．The plot was funny enough.
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单项选择题
Those studies carried out in North Carolina suggest that ________.
A．trees’function for absorbing carbon dioxide is limited
B．carbon dioxide is the main cause for global warming
C．leaves falling from trees can emit more oxygen
D．more carbon dioxide is beneficial for trees’growth for many decades
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