题目内容
________ a certain doubt among the workers as to the necessity of the work.
- A.It existed
- B.There existed
- C.There had
- D.It had
B
there be结构表示客观存在,be动词可用live,lie等词,it be+n.结构表示“具有某特点”,只能用be动词。
there be结构表示客观存在,be动词可用live,lie等词,it be+n.结构表示“具有某特点”,只能用be动词。
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