Which of the following is a back vowel in English? （）
The main difference between /m/ and /n/ lies in（ ）.
Which of the following consonants doesn't fall under the same category according to the voicing?（ ）
Which of the following sets of English sounds differs only in one distinctive feature?（ ）
Which of the following correctly describes the English phoneme /θ/?（ ）
The similarity between the English consonants /p/, /b/, and/m/ is that they are all （）.
The pronunciation of the English contraction “can't” is（ ）.
Which of the following do not belong to the same type?（ ）
（ ）is NOT included in the factors used in analyzing vowels.
Which of the letter “a” in the following words has a different pronunciation from others? （ ）
Language is a system of arbitrary vocal symbols used for human （ ）.
Ghost, dragon and unicorn do not exist in the world, and Confucius is not present at this moment, but we can still use language to refer to them. This reflects that language has the feature of（ ）.
When you talk to your boss or to your friends, you use different words. We could analyze this phenomenon with（ ）.
（ ） is concerned with the social significance of language variation and language use in different speech communities.
According to Britain linguist F. Palmer, there are no real synonyms. Though “cast” and “throw” are considered synonyms, they are different in（ ）.
Which of the following correctly describes the English phoneme /tʃ/?（ ）
/s/ and /θ/ can be distinguished by（ ）.
The professor’s classroom manner was quite（ ）, never revealing the warmth and playfulness she showed in private.