单选题
In those days she was always lost in thought, so that she had to be called three or four times ______ she came to her dinner.
【正确答案】
D
【答案解析】[解析]until意为“直到…才…”；after意为“在…之后”；when意为“当…时候”；before意为“在…之前”。根据本句句意：在那些日子里，她总是想得入神，因此，在她来吃饭之前，总有人叫过她三、四次。故本题答案为D。