题目

They'll have a beer together______,talking about their separate life, but not often.   A. by and by    B. now and then   C.all the time   D. more or less 答案：B 解析: now and then意思为“偶尔；有时”，与not often相吻合。by and by逐渐地；all the time总是；一直；more or less或多或少；几乎。海豹、海豚、鲸、海狮等都是生活在海洋中的哺乳动物，它们（ ）A．用腮呼吸B．用肺呼吸C．用气囊呼吸D．用皮肤呼吸