Autumn ing, down .
A. do the leaves fall
B. the leaves will fall
C. fall the leaves
D. the leaves are falling
网友回答
A. do the leaves fall
B. the leaves will fall
(答案→)C. fall the leaves
D. the leaves are falling
解析：考查倒装句：句意：秋天来了，树叶落下来了。副词down，up，on，in，off，away等放句首的全倒装句式。谓语fall放在主语前面。选C。