题目内容
（请给出正确答案）
[主观题]
How do some parents protect their children from the harm of smoking？A．They smoke only when
How do some parents protect their children from the harm of smoking？
A．They smoke only when their children are not present.
B．They try to keep the smoke away from the children.
C．They choose to smoke second-hand cigarettes.
D．They buy masks specially designed for the children.
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