两道简单的选择题1.There^s a feeling in me ___we will never know what

1.There^s a feeling in me ___we will never know what a UFO is.
that引导的从句做宾语成分,修饰的是Feeling.
2．Are you going to the supermarket?_____you are there,can you get me some milk?
这要注意联系前后的句子：
if假设语气很重,从前面的句子来看,这个提问者几乎肯定了被问话人将要去超市这个事情,所以不用IF;
since如果用在这里也不是既然的意思,表达的先后顺序,当你在超市,你给我带点牛奶,最难的就是区分while、since.但since表达的意思是肯定的语气,如果用since,那么前面的问话就是多余的,所以since不能用在这里.

把英文当成了化学？
什么成分什么的?
以下3句都对.
whil you are there, can you get me some milk ?
if you go there, can you get me some milk
since you were there, why didn't you get me some milk ?

1,that 表示feeling的同位语 即we will never know what a UFO is
2,while ,你不觉得用while读起来很好听吗?
since (因为) 放在原文 中象不象在命令别人?
if(如果) 在这里和since (因为) 差不多,都象在命令.
while(当....时候)