单项选择题

A．They are used for rescue work.
B．They are taking the place of highflying jets.
C．They have been widely used for various purposes.
D．They are now used exclusively for commercial projects.
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单项选择题
A．She will attend the lecture.B．She will draw up a program.C．She will join the Green Movement .D．She is not sure what she will do.
A．She will attend the lecture.
B．She will draw up a program.
C．She will join the "Green Movement".
D．She is not sure what she will do.
单项选择题
A．Not to drive in a heavy rain.B．To do it in an organized way.C．Not to get too close to a storm.D．To spend more time on it in summer.
A．Not to drive in a heavy rain.
B．To do it in an organized way.
C．Not to get too close to a storm.
D．To spend more time on it in summer.
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