Engines are to machines _________ hearts are to animals. 
#73870
A
as
B
that
C
what
D
which
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_________, I have to put it away and focus my attention on study this week.
#67712
A
However the story is amusing
B
No matter amusing is the story
C
However amusing the story is
D
No matter how the story is amusing
Tom  is _______John .    
#73071
A
so clever a boy as
B
so a clever boy as
C
as a clever boy as
D
as clever a boy as﹡