为什么要这么选?1.Once this research ______ is completed,it will bring immense benefit to all mankind.a.product b.arrangement c.project d.appointment2.He decided to sell his farm and _____ a fresh start in business.a.open b.make c.set d.lead

为什么要这么选?1.Once this research ______ is completed,it will bring immense benefit to all mankind.a.product b.arrangement c.project d.appointment2.He decided to sell his farm and _____ a fresh start in business.a.open b.make c.set d.lead this is the house __ our beloved premir zhou once lived and worked为什么要填where而不是which that? This is the house in which Tom once lived中in 为什么要放在which前面 just this once no do you know anyone in paris?no,but i'll make friends once()i 'm settledi'll be settledi've been settledi had sellted为什么这么选,头疼 They get to know each other once they have lunch together by chance.这么说可以吗有个不解:为什么要用WILL GET TO KNOW呢? Someone（must have been）here this morning.为什么括号里要这么填写 once you understand this rule,you'll have no further difficuty.这里可以用while或者when代替once 为什么`` 1.This means(has) been widely （used） now.为什么不是are:used2.All(have)changed we hardly recognise each other at once.为什么不是is. 选择什么?为什么要这么选? 为什么要这么做? 为什么要这么写? This is the room where Lu Xun once lived 这句话可不可以用This is the room where Lu Xun once lived in为什么? is this flat ___ you once lived in为什么填the one?和 Is this the flat which/ that you once lived in 有什么区别? Once,this is a promise A number of students in this class _____ to Beijing once or twice A.were B.have been为什么选B?A不行吗 This is the house __ he once lived __ when he was a child.A which in B that;/ 可以选B吗?为什么? Is this factory____your mother once worked.答案是where 可是为什么不能用in which (注：选项中有in which 但是没有选这个)