单项选择题

Language change is universal, continuous and, to a considerable extent, ______.

A. regular but not systematic
B. irregular and systematic
C. regular and systematic
D. irregular but systematic
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单项选择题
The illocutionary point of ______ has the characteristic that the successful performance of an act of this kind brings about the correspondence between what is said and reality.
A. directives
B. declarations
C. commissives
D. representatives
单项选择题
If you put a finger in each ear and say z-z-z-z-z , you can feel the vibrations of the ______.
A. glottis
B. windpipe
C. larynx
D. vocal cords
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