英语语法,老师进,1,Latest researches show children ___ with high levels of air pollution during their first year of life run a greater risk of developing certain diseases.A,having been associated B,associated B.请问老师为什么?那么A为

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英语语法,老师进,1,Latest researches show children ___ with high levels of air pollution during their first year of life run a greater risk of developing certain diseases.A,having been associated B,associated B.请问老师为什么?那么A为
英语语法,老师进,
1,Latest researches show children ___ with high levels of air pollution during their first year of life run a greater risk of developing certain diseases.A,having been associated B,associated B.请问老师为什么?那么A为什么不对呢?请老师从语法的角度详细解释,

英语语法,老师进,1,Latest researches show children ___ with high levels of air pollution during their first year of life run a greater risk of developing certain diseases.A,having been associated B,associated B.请问老师为什么?那么A为
have been 是完成时态,如果句子里提及一个时间点,而某动作发生在该时间点之前,则需要用完成时态.我们分析一下你所给的句子,children（ ___ with high levels of air pollution during their first year of life ）是从句的主语,其中括号部分是用来修饰children的,这里是associated这个过去分词作定语修饰children,并不是为了强调associate这个动作发生在某个时间点之前哦.

英语语法,老师进,1,Latest researches show children ___ with high levels of air pollution during their first year of life run a greater risk of developing certain diseases.A,having been associated B,associated B.请问老师为什么?那么A为 latest Re-install the latest version game client 是什么 your client is old version.Re-install the latest version game client your client is old version.Re-install the latest version game client 老师应如何讲解英语语法 复数z=a+bi(a,b属于R)的虚部记作Re(z)=a,则Re(2+i分之1）=?老师求救啊 求详解几道英语语法题,不要只给答案1 Come and see me____ two or three___?A、for,days B after,daysC in,days'time D during,day time 为什么不选B2The train leaves at 6a.m.So I have to be at the station _____5:40a.m.at the latest.A unt 英语语法 英语语法, 英语语法, 英语语法, 英语语法 老师英语语法that 注意that后面有“ ’ ”的符号. re 英语语法题 形容词、副词1 高中英语语法填空求解.1 1借给某人某物.英语语法 英语语法 They're all West GermanicThey're all West Germanic英语,德语,荷兰语都是西日耳曼语这句英语有没有语法错误说的对么,如否请改正