there is a tall tree,can you _____.let me try.youmust be careful ,or you may _______A climb up it fall off it B climb it up fall of itC climb it up fall it off为什么
问题描述：
there is a tall tree,can you _____.
let me try.
youmust be careful ,or you may _______
A climb up it fall off it B climb it up fall of it
C climb it up fall it off
为什么
答
climb up sth 表示爬上某物
fall off sth 表示从某物上掉下来
句中or表示否则
答
up off在这里是介词,只有当动词和副词组成的短语时代词要放在二者之间