The boy made a hole in the door to let his cat______. A. in B. out of C. to come in D. to go out
问题描述：
The boy made a hole in the door to let his cat______. A. in B. out of C. to come in D. to go out
答
A 让他的猫进来
let 后加动词原形CD排除
out of 后要加名词不能什么都不加
所以A
let..in让什么什么进来