单项选择题

A （）is the smallest distinctive sound unit or minimum unit of distinctive sound feature.

A.morpheme
B.allophone
C.phoneme
D.tagmeme

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单项选择题

The structural linguists believed that the primary medium of language is （）.

A.visual
B.auditory
C.written
D.oral

单项选择题

A：What Shall I do？I ’m afraid to give a speech in public.B：Don ’t worry!（）sometimes will help you a lot when in danger.

A.being brave
B.brave
C.be brave
D.Have been brave