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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 That is the best way you thought of _______ into trouble.
#32114
A
stopping some young people to get
B
to prevent some young people getting
C
keeping some young people getting
D
preventing some young people getting