单项选择题

A．Why fog freezes at low temperatures.
B．How very small droplets can form.
C．Why the density of fog varies.
D．How water droplets stay suspended in air.
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单项选择题
A．At least three.B．Four.C．Only two foreign languages.D．At least two.
A．At least three.
B．Four.
C．Only two foreign languages.
D．At least two.
单项选择题
A．Mr. Jones might fix the radio.B．She doesn’t want to work for Mr. Jones.C．She doesn’t like to speak to Mr. Jones.D．Mr. Jones may have broken the radio.
A．Mr. Jones might fix the radio.
B．She doesn’t want to work for Mr. Jones.
C．She doesn’t like to speak to Mr. Jones.
D．Mr. Jones may have broken the radio.
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