Question

改错：This is a two-meters-tall tree.

Answer 1

This is a two-meter-tall tree.
因为，既然用过了“-”，meter就不能加“s”了，也可以这么改：This is a two meters tall tree.

Answer 2

This is a two meters tall trees.

Answer 3

This is a two-meters-tall tree.

去掉meters中的s

Answer 4

This is a two-meter-tall tree.
two-meter-tall 做tree的定语，相当于形容词