单项选择题

A．They can be built to be very light.
B．They are inexpensive to operate.
C．They can be directed by remote control.
D．They easily connect distant points.
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单项选择题
A．How to select a good umbrella.B．How to sharpen the senses.C．How to treat minor aches and pains.D．How to predict the weather.
A．How to select a good umbrella.
B．How to sharpen the senses.
C．How to treat minor aches and pains.
D．How to predict the weather.
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A．A journey to Canada.B．An impression of a foreign country.C．Culture shock in a new environment.D．A hard experience in a foreign country.
A．A journey to Canada.
B．An impression of a foreign country.
C．Culture shock in a new environment.
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