单项选择题

Before set up his pizza delivery service, he

A．tested samples on potential clients.
B．handed out product questionnaires.
C．assessed demand in different areas.
D．trained staff for a few months.
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单项选择题
______ refers to the phenomenon that words of different meanings have the same form.
[A] Polysemy
[B] Synonymy
[C] nomonymy
[D] nyponymy
单项选择题
A (n) ______ is a unit that is of distinctive value. It is an abstract unit, a collection of distinctive phonetic features.
[A] phone
[B] sound
[C] allophone
[D] phoneme
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