红树林吸日月之精华，经风雨之洗礼，贫瘠____的海滩湿地却是豪华的温床。它们凭着枝繁叶茂，盘根错节，古木苍茎，lín____峋如蛟，一连连、一排排，结成摧不垮的团队，风流在海与岸之间，xiāo____洒在水与天之间，化惊涛为诗人的吟哦，拨响大海的弦____音，饱尝海水咸涩的滋味，苦苦死守贫寒的湿地，niàng____造出福荫人类的生态环境。

（摘自魏清潮《海风吹过红树林》）

冬季教室不打开门窗，时间久了会觉得头晕，精神不振，主要原因是（　　）

将下列陈述句改成反问句

①您吃过饭了。

②有一位管家求见。

下图为我国“某城市地租水平与人口密度变化示意图”，读图完成题。

听短文，写出所缺部分。

    Hi! My name is Linda! I'm a middle school student. It was____lastSunday．After breakfast, my grandparents went for a walk in the park with their dog．They liked the____air there．My father____with his friend．My mother had to____．What about my brother? He read a book about____in his room．I practiced the piano in the living room．