语法与词汇 19.Although the heavy rain stopped, it was at least an hour later that the flood began to______.

【正确答案】 B

【答案解析】句意：尽管大雨停了，但至少一小时后洪水才开始消退。recede(洪水)退下。retire退休。recline向后靠，斜倚。retreat撤退。