When ______ comes to research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.
#93492
A
that
B
it
C
this
D
what
推荐题目
--- Did you enjoy yourself at the party? --- Sorry to say I didn't. It was _____ a meeting than a party.
#94871
A
more
B
more or less
C
less
D
rather like
This picture brought the hours back to me ____ I was taken good care of in that faraway village.
#93130
A
until
B
when
C
where
D
that
The price of the flat now is ______ that last year.
#93250
A
as twice high as
B
twice more expensive than
C
as high as twice
D
twice the amount of
It never _____ humans until the mid1990s that some animals can be cloned.
#92718
A
occur
B
is occurred
C
occurred to
D
occurred