单项选择题

The oldest documented age for a redwood tree is approximately ______

A．350 years
B．400 years
C．800 years
D．2,000 years
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单项选择题
The woman found out about the item______
A．because a salesman recommended it
B．because she saw an advertisement
C．because hex friend has one
D．because she bought one before
单项选择题
Many tourists visit Muir woods rather than other redwood forests ______
A．because it has no admission fee
B．because it is near San Francisco
C．because it has a good view of the coast
D．because it can be seen in one hour
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