单项选择题

Which of the following nouns does not share the same form of its singular and plural form

A．sheep
B．means
C．spacecraft
D．ox
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单项选择题
Mr. and Mrs. Smith are so excited today, for they bought ______ yesterday.
A．many furnitures
B．so much furnitures
C．many pieces of furnitures
D．a lot of furniture
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