从所给出的单词中选出合适的完成对话。

 on     Wednesday   with   piano   busy

Mike: Are you free ____ Monday afternoon, Bill?

Bill: No, I am not. I play basketball on Monday afternoon.

Mike: How about Tuesday afternoon?

Bill: I am sorry. I play the ____ on Tuesday afternoon.

Mike: How about ____ afternoon?

Bill: No, I am not. I go to the museum ____ my brother.

Mike: You are very____.

Bill: Yes, I am busy from Monday to Wednesday.

阅读材料，回答问题

材料一：红红在道德与法治学科老师的指导下，以“我与父母”为题，对全班同学进行了问卷调查，结果如下：

问题，A．你是否经常给下班回家的父母端茶倒水，B．你是否经常帮助父母做力所能及的家务，C．你是否觉得父母越来越不可理喻，经常顶撞父母，D．你是否自己整理自己的床铺，打扫自己的房间回答“是”的，占3．8%，占16．5%，占29．7%，占19．7%材料二：“千万里，他们从天南地北回来为你送行。你走了，你没有离开。教书、家访、化缘，埋头苦干，拼命硬干。你是不灭的蜡烛，是不倒的脊梁。那一夜，孩子们熄灭了校园所有的灯，而你在天上熠熠闪亮。”这是“感动中国”评选委员会给2015年度感动中国获奖人物——广西都安高中的原校长莫振高的颁奖词。任教三十多年来，莫振高不仅用自己微薄的工资资助近300名学生上大学，还利用休息时间，来到全国各地的机关、企事业单位，做演讲、做动员，筹集了3 000多万元善款，让1．8万贫困学子圆了大学梦。因积劳成疾，莫振高于2015年3月9日突发心脏病去世。

     I like taking a long walk in the nature park. I do that    1  . It really makes a great    2   to the whole day! I usually walk up this nice long road. It's so quiet and pleasant   3   there are so many green trees.
    This morning, I walked on that road as usual.  4I was walking back down the road, on my way back    5 the car, I met a man. I saw him   6 on the grass by the roadside. He was breathing(呼吸) really    7 . I asked if he was OK. He said he was   8  tired to walk anymore. I thought he needed some  9  . So I began to look for some clean water.    10 , there weren't any places to get water in 11  a nature park. I walked back to my car    12  to see if there was some. Because I sometimes bring bottled water and leave    13in my car. Thankfully, I found some today.
    Instead of (代替) drinking it myself, I drove back to the man and gave him my bottle of water. Then I gave him a   14   back to his car. He was so thankful! I could tell he was very happy and surprised that someone was    15   to come back for him and give him some water. And also, I was very happy that I could share my water with others.

物质的下列性质中，属于化学性质的是（     ）

室温下向10mL 0.1mol•L^﹣1NaOH溶液中加入0.1mol•L^﹣1的一元酸HA溶液pH的变化曲线如图所示．下列说法不正确的是（   ）