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