单选题 Penny joined a new company three months ago. However, she didn't feel herself ______. so she left at last.
A. show off B. fit in C. go up D. come over

【正确答案】 B
【答案解析】[解析] 该题考查动词短语的辨析。show off表示“炫耀”；fit in表示“适合”；go up表示“上升，被建造”；come over表示“过来，顺便来访”。根据文意，选B。