It was the training ____ he had as a young man ____ made him such a good engineer.
#84997
A
what; that
B
which; that
C
that; which
D
that; what
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I really don’t know for certain____ they discussed.this important event very secretly.
#85512
A
where was it that
B
where it was that
C
where that
D
it was where that
It was on October 1st _____ new China was founded.
#85021
A
which    
B
that     
C
when
D
as