单项选择题

What can we infer from the talk

A．Powerful earthquakes usually occur after minor ones.
B．Modern facilities add to the danger of an earthquake.
C．Passing trucks are as dangerous as minor earthquakes.
D．There is a powerful earthquake occurring every two years.
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What has been the major problem in the Great Lakes in recent years
A．Too much algae.
B．Excessive recreational use.
C．Lack of adequate rainfall.
D．Too much evaporation.
单项选择题
Why do you think the author wrote this passage
A．To teach people to speak English.
B．To explain why language learning is difficult.
C．To compare language learning with other types of learning.
D．To encourage language learners to use these techniques,
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