The last five years have seen many disasters in China.这句话的have为什么不用单数?

We‘ve been working hard for the last five years.中the last有什么作用?for the last years与for five years有什么不同? The boy was __________ and______________ his way last weekendA、five-year-old；lost B、five years old；losed C、five years old；lost D、five-years-old；lost in the last five tears 与 for the last five years一样吗?in the last five years = for the last five years这个等号成立吗?有没有during the last five years 这种说法哪一个是现在完成时的标志呢？ in the last five 1.This book is said ______ into several languages in the last five years. How greatly you've ____in the last five years!(横线填什么) I left school for the last time five years ago.(用现在完成时改写) Writing:How have you changed in the last five years?How have you changed in the last five years?Write a short paragraph (about 5 sentences) describing some changes about yourself. The last five years have seen many disasters in China.这句话的have为什么不用单数? The cheaper washing machines should ______ about five years .A be used B last C work on D be lasted she 's worn this type of perfume for the last twenty-five years.请帮忙翻译下, five years ___ ____since we saw each other last time the girlis five years old怎么读 The population of the city,twenty-five of which______,_______ 10%in the last three years.a.are Japanese;has risen byb.are Germans;has felt by I bought the house five years ago?I___ ___ the house for five years. My brother has ( )( )( )of the army for five years.原句是join the army five years ago. the last factory--i am going to visit is the place --my mother worked five years ago.答案是“that ,where”想问一下“which,where”可不可以 Alan d___ some writing yesterday evening.Marchs the t___ mouth of the year.Diana s___ up late to study last night.He w___ a worker five years ago.