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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Sometimes I wonder ______ that has made me feel differently from the others. 
#85192
A
how is it
B
what is it
C
how it is
D
what it is
—_____ that he picked up French? —It was in 2010_____ he traveled in France.
#85162
A
Was it when; that
B
When was it; that
C
Was it when; when
D
When was it; when
It is in the west of   China _____ there is no doubt _____it is going to rain tomorrow.
#85352
A
where; whether
B
that; that
C
that; whether
D
where; that