In autumn,the ________ fall down from the trees.

问题描述:

In autumn,the ________ fall down from the trees.
A.leaf
B.leafs
C.leaves

选 C
在秋天,树叶从树上掉落下来
根据谓语动词fall down可以判断,这里是复数,因为没有用到第三人称单数falls
leaf的复数形式为leaves