问题
选择题
He put up a map ___ the back wall because there was a hole ___ it. [ ]
A. on; on
B. at; in
C. on; in
D. on; at
答案
答案：C
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He put up a map ___ the back wall because there was a hole ___ it. [ ]
A. on; on
B. at; in
C. on; in
D. on; at
答案：C