________acertaindoubtamongtheworke

发布时间:2020-07-11 04:16:36

________ 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

网友回答

B解析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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