【-------a certain doubt among the students as t】

问题补充：

-------a certain doubt among the students as to the necessity of the work.A.They had B.There existedC.It existed D.There had

答案：

题干翻译为：同学们对这项工作的必要性有一定程度的怀疑.

题目考察there be 句型,注意固定搭配,不要和have重叠使用.

there be 句型亦可用there exist表达.选B

======以下答案可供参考======

供参考答案1:

一定的怀疑,在学生中间的必要性的工作。

A 他们 B。存在

C。它存在 D。有

选B