单选题
______ they must learn in a course is not provided in the classroom.
A、
Many things
B、
Much of what
C、
So much
D、
All of which
【正确答案】
B
【答案解析】
[解析] much of what they must learn in a course意为“他们在一门课程中所必须学到的很多东西”。
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