单项选择题

A．The average life span was less than 50 years.
B．It was very common for them to have 12 children.
C．They retired from work much earlier than today.
D．They were quite optimistic about their future.
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单项选择题
A．Fred forgot to call him last night about the camping trip. B．He is not going to lend his sleeping bag to Fred. C．He has not seen Fred at the gym for some time. D．Fred may have borrowed a sleeping bag from someone else.
A．Fred forgot to call him last night about the camping trip.
B．He is not going to lend his sleeping bag to Fred.
C．He has not seen Fred at the gym for some time.
D．Fred may have borrowed a sleeping bag from someone else.
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