There is no doubt______ one day the medicine for AIDS will be made.
#93556
A
that
B
whether
C
if
D
so
推荐题目
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
It _____ quite a few years _____ the accused was declared innocent and set free.
#94796
A
was; since
B
is; that
C
will be; when
D
was; before
–Well, I do think the rabbit is a beautiful,gentle animal which can run very fast.– ______.
#92359
A
So it is
B
So is it
C
So does it
D
So it does
We can hardly believe his excuse for his late show _______ his car broke down halfway.
#92972
A
why
B
that
C
where
D
as
More wild tigers have been seen in the forest around this area, ________ there used to be very few.
#93739
A
when
B
where
C
what
D
which