下面的图形是由边长1厘米的小正方形拼成的，这个图形的周长是10厘米。（ ）

改正下列病句，并说明理由。
（1）他不仅能用新的理论指导自己的工作，而且还能吃透这些理论的精神。
（2）校对的正确、装帧的美观、印刷质量的好坏，都是我们应当做到的。

    My name is Dennis. I'm a worker(工人) of a big store. I don't work in the morning. I work at night. Every morning I come home at about 6:30. I have breakfast at 7:00. After breakfast I go to bed. I get up at around 2:30. I have lunch at 2:45 and dinner at 7:40. Then I go to work at 8:30. My work starts at 9:00. I look after(照看) the store every night. I like my work very much.