题目内容

What are the letter or letters that can be pronounced as /3:/?

A. e
B. ear
C. er
D. o

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What are the letter or letters that can be pronounced as /ə/?

A. a
B. e
C. i
D. o

What’s the feature of pronouncing the central vowels?They are made with the tongue around the ___________ of the mouth. (答案要求为纯小写字母。)

There are only two central vowels in English: /3:/ and /ə/ .

A. 对
B. 错

The English pure vowels can be classified according to the height of the raised part of the tongue.

A. 对
B. 错