It is the idea____smiles can get rid of cold ____has been proved by the researchers many times.  
#85504
A
which; which
B
that; that
C
that; which
D
which; that
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It was _____________ back home after the experiment.
#85040
A
not until midnight did he go
B
until midnight he didn’t go
C
not until midnight that he went
D
until midnight when he didn’t go
It was in the factory _____ I worked _____ I got to know her.
#85068
A
where;that
B
that; that
C
which; that
D
where, where
 It is_____the pupils do in their spare time_____ really______ them to take their place in society as citizens when they grow up.
#84795
A
what; that; prepare
B
that; what; prepares
C
what; that; prepares
D
that; what; prepare