单项选择题

A．To explain why language learning is difficult.
B．To teach people to speak English.
C．To compare language learning with other types of learning.
D．To encourage language learners to use these techniques.
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What is China’s ranking position as an exporter of tea to Britain today
单项选择题
A．To avoid direct Sunlight.B．To keep out the cold.C．To limit space used.D．To conform to other houses.
A．To avoid direct Sunlight.
B．To keep out the cold.
C．To limit space used.
D．To conform to other houses.
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