this is their first visit to school中to 的理解

this is their first visit to China 中first用的对不对 This is My first 选择:This is their first ( )to China.A.live B.visit C.stay D.get this is their first visit to school中to 的理解 This is the first time in their lives to ski on the Apls.划分句子成分 This is _ class.So the teacher doesn't know all of his students.A .their first B.a their first Ctheir the first D a first选哪个,为什么 This is not the first this is their【】【love】son 26.This is the first time in their _______to ski on the ApLs.A.life B.lifes C.lives This is the first time in their lives to ski on the Apls.关键是Apl是什么意思 he is their only child.their first baby was born -- This is my first bag中first前要加the吗 this is my first time______（cook） This is my first visit ________ China. first time login,this is a test Around this world ,the last is first. this is their clasroom.it is ( ) this的适当形式 this is their two children 为什么用this is?