________acertaindoubtamongtheworkersastothenecessityoft...

問題詳情：

________ a certain doubt among the workers as to the necessity of the work.

A．There existed  B．It existed

C．There had  D．It had

【回答】

A　此處There existed a certain doubt＝There was a certain doubt，是There be結構的變式。

知識點：固定句型

題型：選擇題