单项选择题

A．It’s a comparison, he wants to describe how earthquakes cause turbidity currents.
B．He wants to describe desert winds.
C．He means desert winds can cause turbidity currents.
D．He just talks about another topic.
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单项选择题
A．Because they have to.B．Because they want to.C．Because their children want them to.D．Because they don’t know how to spend their spare time.
A．Because they have to.
B．Because they want to.
C．Because their children want them to.
D．Because they don’t know how to spend their spare time.
单项选择题
A．Buy a table in the shop.B．Eat at a restaurant.C．Look for a nice restaurant.D．Order a meal by telephone.
A．Buy a table in the shop.
B．Eat at a restaurant.
C．Look for a nice restaurant.
D．Order a meal by telephone.
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