应选B anywhere

somewhere常用作副词,意为“到某处,在某处”；anywhere“在任何地方,到任何地方”.somewhere用于肯定句,而在否定句、疑问句、if（whether）从句中,则用anywhere.
everywhere 每个地方
nowhereadv. 无处；任何地方都不；毫无结果

Granny looked for her book, but she couldn’t find it anywhere.
奶奶在找她的书,但是她找遍了都没找到.