Was it in the science museum _______ you visited yesterday _______ you left your keys?
#68112
A
that; where
B
that;/
C
/; that
D
where; that
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 The scientist, __________ my father works, is about 50.
#66953
A
on whom
B
to which
C
with which
D
with whom
The factory was built in a secret place, around _________ high mountains. 
#73444
A
which was
B
it was
C
which were
D
them were
They will telephone the police and complain about it       the noise     .
#41174
A
if; stops
B
unless; stops
C
if not; stops
D
unless; doesn’t stop