问题
选择题
The apple trees have lots of big apples ________ them. And some birds are singing ________ the trees.
A．in; on
B．at; in
C．on; in
D．with; through
答案
答案：C
介词on意为“在…之上，依附于”；in意为“(表场所，位置)在……之内 / 上”in the tree 译为“在树上”。