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.
单项选择题
Unless children have other people in their lives who speak another language, they won’’t become fluent speakers in that language.
A．Y
B．N
C．NG
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