问题
选择题
Experts warn that global warming will cause dramatic climate changes, including more ________ floods,
heat waves and droughts.[ ]
A．usual
B．frequent
C．ordinary
D．common
答案
答案：B
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Experts warn that global warming will cause dramatic climate changes, including more ________ floods,
heat waves and droughts.[ ]
A．usual
B．frequent
C．ordinary
D．common
答案：B