She reminds the class how scientists define begging ca
结尾处,相当于主旨,而且重复,出题,看到我划得exposure,所以最后一题选C
20. What is the evidence for chaffinches having a sensitive period for song learning?
They begin to practice their song in the spring.
They do not develop full song until their second year.
They need little exposure to adult song in order to learn it.
They do not make many sounds for the first five weeks of their lives.
总之,一定要用笔记整理出听力的结构,定准结构点,做题才会准确。
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