单项选择题

Falls in the bathroom are considered to be unfortunate because （）

A．they can easily be avoided
B．old people seldom fall in bathrooms
C．grab bars do not help to prevent falls
D．bathroom accidents are difficult to prevent

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单项选择题

Which of the following is included in the car-renting rate（）

A．Gas used.
B．Car repairs.
C．The hotel charge.
D．Insurance fee.