英语小问题。能者来帮忙

This is the first time ___I have been here.
A that B when Cwhich D in that

When you read the book,you'd better make a mark ___you have any questions.
A at which B at where C the place where Dwhere

After the war,a new school building was put up__there had once been a theatre.
A that B where C which D when

Why do you want a new job __you've got such a good one already.
A that B where Cwhich Dthis

Is __you want to say?
A all that B all what C that all D what all

Dr.Black comes from either Oxford or Cambridge,I can't remember____
A where B there C which D that

It was careless of you to leave your clothes outside all night.
My God!______
A So did I B So I did C.So were you D So did you.

希望能简单解释一下。谢谢。

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