问一道英语语法题~China's new food law provides for a food recall (召回) system ______ producers have to stop production if their food isn't up to standards.A.where B.that C.when D.which请说明原因~如果选that 的话，为什么where

问一道英语语法题~China's new food law provides for a food recall (召回) system ______ producers have to stop production if their food isn't up to standards.A.where B.that C.when D.which请说明原因~如果选that 的话，为什么where 一道英语语法题,Our country's _____language is Chinese.(office) it is china's lunar new year new openness是什么意思?老是看见China's new openness 一道说难不难的英语题 速求他说 Julie 13 like china a lot learn chinese now favourite animal is panda she speak japanese 问 他来自 A New York B Sydney C Tokyo D Paris 一道英语语法填空能否帮忙讲解下第九问, 一道高中英语语法填空求教第九题 帮我做一道英语语法题,急 一道高三英语语法题.急>. 一道英语语法填空求教第九题 一道英语语法改错题,求指导 一道英语语法选择错题,求原因, 一道高中英语语法题The time is not far away__when____modern communications will become widespread in China's vast countryside.为什么填when?不可以是that吗,同位语从句,和time同位?可以填when我知道原因，可是这不可以 一道初中英语填空题：China is an （ ）country.It's east of Aisa.(Aisa) 送分!问英语弱智题!many children want to _____friends of the earth nowdo be make haveplease look__the new model car it's quite different from the old oneright that's right all right that's all right china realized its_____to give the world a 一道关于定语从句的超强题,这是我见过最难的从句题.强悍者速来挑战一下!China's new food law provides for a food recall system____producers have to stop production if their food isn't up to standards.A.where B.that C.when D 我的寒假作业上有一道“挑战自我”的英语题.具体的题目请看问题补充. 求英语大神解答The Spring Festival is the Chinese New Year's D_____ .It usually comes in F_______ . Everyone in China l______ the Spring Festival. 问一道初三英语完形填空题China is the country ___1__ the largest population in the world.Too many people ___2___ too many problems,such as a __3___ problem.And today,China's population is still growing very fast,____4____ in order to contr