Why did their friends react so negatively to their plan about their trip?
A. They thought their lives might be endangered.
B. They thought their plan was not prudently made.
C. They believed that the tourist areas were peculiar.
D. They believed that the people in the tourist areas were eccentric.
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Sip and zip, tip and dip, mop and nap are all__________.
A. minimal pairs
B. diphthongs
C. allophones
D. phonemes
动能武器由发射装置、探测系统、瞄准系统、弹丸组成。()
If a teacher asks students to list as many ways as they can to tell someone to open the door and list the possible functions of a sentence in different contexts, he / she is probably trying to highlight__________.
A. the potential meanings of a sentence
B. different realizations of the same function
C. the relationship between form. and function
D. different ways of getting people to do the same thing