【正确答案】 B

【答案解析】[解析] 画线词quit为动词，意为“停止”，B项stop意为“停止”，与画线词意思相近；例：The train stopped at the station. 火车在车站停了下来。A项increase意为“增加”；例：The workers are trying their best to increase productivity. 工人们正竭尽全力提高生产力。C项continue意为“继续”；例：He continued his writing for another year. 他又继续写了一年。D项keep意为“保持，阻止”；例：Robbie couldn't keep the child from yelling. 罗比没法使孩子不大叫大嚷。