Some researchers believe that there is no doubt ______ a cure for AIDS will be found.
#72535
A
which
B
that
C
what
D
whether
推荐题目
 This is the very knife _____ I used to cut apples yesterday.
#73482
A
that
B
by which
C
which
D
with which
She likes to use words ___ is clear to us.
#72149
A
of which meaning
B
whose of meaning
C
meaning of which
D
of which the meaning
There were 20 people sitting in the room, half ___ were women.
#71594
A
of whom
B
of which
C
about that
D
about whom