It  was  about  600  years  ago ______the  first  clock  with  a  face  and  an  hour  hand  was  made .   
#85478
A
that
B
until
C
before
D
when
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It was on October 1st _____ new China was founded.
#85021
A
which    
B
that     
C
when
D
as
I really don’t know          I put my wallet after I paid the bill.
#84659
A
where was it
B
it was where that
C
where it was that
D
where was it that
________she is not so healthy _______she used to be?
#85321
A
Why is it that; what
B
Why it is that; that
C
Why is it that; as
D
Why it is that; who