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
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
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”。