____a certain doubt among the people as
题型:选择题
问题:
____ a certain doubt among the people as to the practical value of the project. [ ]
A. It has
B. They have
C. It remains
D. There remains
____ a certain doubt among the people as to the practical value of the project. [ ]
A. It has
B. They have
C. It remains
D. There remains