问题
选择题
They ______ in ______ same grade. [ ]
A. all are; a
B. are all; the
C. all are; /
D. all; the
答案
答案：B
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They ______ in ______ same grade. [ ]
A. all are; a
B. are all; the
C. all are; /
D. all; the
答案：B