This is the museum ___you saw the other day.

 A. that B. where C. in which D.  in that

This museum is _____you visited the other day.

A. that B. which C. where D.  the one

This is the museum _______we saw an exhibition the other day.

A. that   B. which     C. where     D.  in that

Air,___we breathe every day,is around us all the time.

A. that B. /  C. which  D.  it

Is oxygen the only gas ______helps fire burn?

A. that    B. /   C. which   D.  what

This is the biggest lab ______we have ever built in our university.

A. which   B. what    C. that   D.  where

I can tell you ______he told me last week.

A. all which  B. all what    C. that all   D.  all that

All the apples ______fell down from the tree were eaten op by the pigs.

A. which    B. /    C. that    D.  they

The radio set ______last week has been out of order.

A. I bought   B. I bought it   C. which I bought it   D.  what I bought

Please pass me the dictionary _____cover is black.

A. which      B. its     C. whose     D.  which of