单项选择题

A．They can easily catch fire.
B．They can be easily operated.
C．They are not as safe as gas balloons.
D．They cost too much money.
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单项选择题
A．Tidy.B．Messy.C．Well-made.D．Bright.
A．Tidy.
B．Messy.
C．Well-made.
D．Bright.
单项选择题
A．The man’s mother.B．The man’s mother-in-law.C．The child’s mother.D．The woman’s mother-in-law.
A．The man’s mother.
B．The man’s mother-in-law.
C．The child’s mother.
D．The woman’s mother-in-law.
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