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。