问题
选择题
We have math ________ Friday. It's difficult ________ interesting.[ ]
A. on, or
B. on, and
C. in, or
D. in, and
答案
答案：B
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We have math ________ Friday. It's difficult ________ interesting.[ ]
A. on, or
B. on, and
C. in, or
D. in, and
答案：B