问题
选择题
The bird is singing _____________ the tree. The red apples are _____________ the tree. [ ]
A. in, on
B. on, in
C. at, on
答案
答案：A
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The bird is singing _____________ the tree. The red apples are _____________ the tree. [ ]
A. in, on
B. on, in
C. at, on
答案：A