Mary liked to look back on her high—school days， she thought were the happiest in her life．
#69141
A
that
B
what
C
which
D
when
推荐题目
Some researchers believe that there is no doubt___ a cure for AIDS will be found.
#74636
A
which
B
that
C
what
D
whether
Not until midnight______back from work, drunken .
#73737
A
he did come
B
he came
C
didn't he come
D
did he come
There was no sign _______ they had died from diseases such as bird flu - the main worry in such cases. Among the theories was _______ a truck had collided（碰撞）with the crowd.
#67815
A
/; that
B
that; that
C
that; which
D
that; /
Why not try your lick downtown, Bob? That’s __________ the best jobs are.
#72448
A
where
B
what
C
when
D
why