问题
选择题
I have science_____________Monday. It's difficult________ interesting. [ ]
A. on; so
B. at; but
C. on; but
D. at; so
答案
答案：C
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I have science_____________Monday. It's difficult________ interesting. [ ]
A. on; so
B. at; but
C. on; but
D. at; so
答案：C
[ ]