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; /
推荐题目
________, I could not memorize the text.
#69938
A
However hard did I try
B
However hard I tried
C
However I tried hard
D
However I had tried hard
 It was in the factory      producced TV sets     our friend was murdered.
#70088
A
which ; which
B
that ; which
C
that ; that
D
where ;that