______ a certain doubt among the people as to the practical value of the project.
#95174
A
It has
B
They have
C
It remains
D
There remains
推荐题目
—Oh, dear! I forgot the air tickets.   —You ______ something.  
#92603
A
have left
B
are always leaving 
C
are leaving
D
always left
Tom is ___________ that he can’t go to school.
#93533
A
so a young boy
B
a so young boy
C
a such young boy
D
such a young boy