单项选择题

（）, you'd better keep it away from kids.

A．To be safe
B．being safe
C．That for safe
D．As be safe

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A．helps
B．helping
C．help
D．helped

It is five years （） he left his hometown. A．when B．from...

单项选择题It is five years （） he left his hometown.

A．when
B．from
C．since
D．while