—Where is our English teacher?—She is in the classroom, the exercises the students have

发布时间：2020-08-15 02:54:37

—Where is our English teacher?
—She is in the classroom,      the exercises      the students have done at home.
A. explaining; /
B. explaining; for
C. explained; to
D. explained; from

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(答案→)A. explaining; /
B. explaining; for
C. explained; to
D. explained; from
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