Lawrence Craven,a doctor from the USA,is the author of several published reports,one of     ________introduced the idea in 1953      aspirin could reduce the risk of heart attacks.
#32689
A
them; when
B
which; that
C
what;that
D
which; when
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 Willpower is a kind of quality, ________ is ________ it takes to do anything well.
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A
what; which
B
what; what
C
which; which
D
which; what
I thought him nice and honest ______ I met her.
#31298
A
first time
B
for the first time
C
the first time
D
by the first time