Shehasjustswallowedadumpling

問題詳情：

She has just swallowed a dumpling __________.

      A. at a mouthful                           B. with a mouth

      C. at mouthful                             D. with mouth

【回答】

A

解析： at a mouthful “一口吞下某物”。

知識點：固定句型

題型：選擇題