Was it 80 years before Christopher Columbus crossed the Atlantic ______ Zheng He hadsailed to East Africa? 
#84845
A
when
B
that
C
after
D
since
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Was it through Mary _____ was working at a high school ____ you got to know Tom?
#84988
A
who; who
B
that; which
C
who; that
D
who; which
I can’t quite remember ________ you started playing golf.   
#85129
A
when it was that
B
when was it that
C
that it was when
D
that was it when
It was ___ he came back from school today ___ he found his new book missing.
#85291
A
when; then
B
not; until
C
not until; that
D
only; when