单项选择题

A．In warm air.
B．In cold air.
C．When it reaches the polar region.
D．Only when the clouds are down low.
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单项选择题
A．It has been suffering from heavy rainfalls.B．It has been suffering from severe drought.C．It has been suffering from heavy sandstorm.D．It has been suffering from high temperature.
A．It has been suffering from heavy rainfalls.
B．It has been suffering from severe drought.
C．It has been suffering from heavy sandstorm.
D．It has been suffering from high temperature.
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struck
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