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题目内容
（当代英语语法概论）
[填空题,0.7分] Put the following words in appropriate groups :
physics, news, stationery, crowd
A. Singular only: _______________
B. Both singular and plural: _____________
physics, news, stationery, crowd
A. Singular only: _______________
B. Both singular and plural: _____________
参考答案
