Is there any flowers the tree.No. But there are many birds it.A. in onB. in in

问题补充：

--- Is there any flowers the tree.

--- No. But there are many birds it.

A. in, on

B. in, in

C. on, in

D. on, on

答案：

A. in, on

B. in, in

(答案→)C. on, in

D. on, on

解析：in在里面；on在上面。句意：树上有花吗？——没有，但是上面有许多鸟。在表示在树上这一含义时，如果是树木本身生长的事物则用介词on，如果非树木所生事物，则用介词in，结合语境可知选C。