河南成教 / 河南理工大学
正确率：100%
9、
The students were assigned to write a paper on ________ from the course.
A.whathadtheylearned
B.thathadtheylearned
C.thattheyhadlearned
D.whattheyhadlearned
The students were assigned to write a paper on ________ from the course.
参考答案：
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