Some researchers believe that there is no doubt______a cure for AIDS will be found.
#67655
A
whether
B
that
C
what
D
which
推荐题目
 No sooner_______than it began to rain heavily. 
#72154
A
the game began
B
has the game begun
C
did the game begin
D
had the game begun
____ seems strange to us is ______ she can sing so many English songs beautifully.
#70417
A
It; that   
B
That; how   
C
It; Why   
D
What; that