下图（图1）为关节结构示意图，请回答相关的问题：

⑴请写出A____ 、B____ 、C____ 、D____ 各代表的结构名称。
⑵B和D合称为____ ；在B 、D的表面都覆盖有光滑的____ 。
⑶在A的里面和外面都有坚韧的____ ；在C内有____ ，这样使关节既牢固又灵活。

连词成句。

①像 电视塔 一个 巨人

②东方明珠 电视塔 是 一座

把肯定句改成否定句

①她喜欢唱歌。

②我们都举手赞同。

根据短文内容选择答案。

      My name is Jack. I am a pupil of Grade One. I'm in No.1 Middle School. On weekdays I get up at six o'clock. I have breakfast at seven and then I go to school by bike. We begin our class at eight o’clock in the morning. We have four classes in the morning and three in the afternoon.

      At noon, I have lunch at home. Classes are over at four fifteen in the afternoon. After class, we often play football in the afternoon. I go home at about five. I have supper at about six thirty in the evening. I do my homework at seven thirty. At weekends, I watch TV. I often go to bed at ten. I'm very happy.