【1】:B
【2】:so...that和such...that的意思均为“如此……以致……”
so...that结构中的so为副词,后面跟形容词或副词;such...that中的such为形容词,后面接名词(名词前可以有形容词或副词修饰)
It was such a fine day that we went out for a walk.那是一个很晴朗的日子,我们出去散步.
She is such a good teacher that we all love her.她是一位好老师,我们都爱她.
.当that前是不可数名词或复数可数名词时,则必须用such,不能用so来代替.例如: It was such fine weather that they all went swimming.那是个好天气,他们都去游泳了.
【3】:neither
【4】:return back的意思是reciprocate(回报;报答;酬答)
可以这样用,Return it back to me.( 把它还给我.)
但是,return本来就有come or go back之意,所以return之后最好别加back.(特别是考试中)