问题
选择题
Do all the students know _____ ? [ ]
A. why they are studying for
B. what are they studying
C. what they are studying for
D. what are they studying for
答案
答案：C
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Do all the students know _____ ? [ ]
A. why they are studying for
B. what are they studying
C. what they are studying for
D. what are they studying for
答案：C