问题
选择题
Li Ping and Liu Ming are in the same _____, but in differernt _____. [ ]
A. class ; grade
B. grade ; class
C. class ; grades
D. grade ; classes
答案
答案：D
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Li Ping and Liu Ming are in the same _____, but in differernt _____. [ ]
A. class ; grade
B. grade ; class
C. class ; grades
D. grade ; classes
答案：D