----- a certain doubt among the people as to the practical v

_____ 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 我想问一下,为什么A不能做形式主语? 答：D译：关于这个项目的实际价值,这些人中还存在一定的怀疑。析：there remains （to be)是there be句型的一个变体（其它的如：there lives/stands/ lies) 选A,错大了,it指代什么不明。 it has是它有（拥有）,不是“存存”之有。如用they have, 则不要再说among the people, 因为they=the people 如改成some have也行。Some have a certain doubt among the people as to the practical value of the project。 关于这个项目的实际价值,（这些人当中的）有些人有一定的怀疑。