An English Test.

Hello,these are tests given by my English teacher. Anyone helps me? Thank you very much.

There are some tests and I wanna know the exact answer although I am sure they are probably the right ones.
1._____ a fine day,we decided to go out for a picnic.
A.Having been B.Being C.What D.It being

A or D, D seems better for me.
2.There has not been a great response to the sale,____?
A.dose there B.hasn't it C.hasn't there D.has there

Tag question, so D should be okay, right?
3._____they reached the center of the city,they stopped the car at a bar.
A.A mile or so before B.For a mile or so after C.Further than a mile or so D.Before a mile or so when

A converse sentence, A mile or so should be put in the first placce, right?
4.The president of university as well as some other faculty members ____ a conference.
A.are planning B.have planned C.is planning D.had planned

is planing
5.Having no money but ____ to know,he simply said he would go with dinner.
A.not to want anyone B.wanted no one C.not wanting anyone D.to want no one
6.____ the case,there were no grounds to justify your complaints.
A.Being such B.Such is C.It being such D.Such being

such being the case,right?