问题
选择题
In China students _______ greet the teachers when classes begin. [ ]
A. are supposed to
B. are suppose to
C. suppose to
D. are supposing to
答案
答案：A
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In China students _______ greet the teachers when classes begin. [ ]
A. are supposed to
B. are suppose to
C. suppose to
D. are supposing to
答案：A