日常生活中我们使用的数是十进制数．而计算机使用的数是二进制数，即数的进位方法是“逢二进一”．二进制数只使用数字0，1，如二进制数1101记为1101₂，1101₂通过式子1×2³+1×2²+0×2+1可以转换为十进制数13，仿照上面的转换方法，将二进制数11101₂转换为十进制数是（　　）

A．4

B．25

C．29

D．33

单词拼写与运用。

根据句意完成已给出首字母或汉语提示的单词，使补全后的句子意思通顺，语法正确。

1. September is the n________ month of the year.

2. I work in a l________. There are many books for people to read.

3. Please be q _____, the child is doing his homework.

4. We can't listen to music in the hallway, but we can listen to it o _____.

5. He is a policeman and all the_____ (小偷) don't like him.

6. Thanks for ________ (帮助)me.

7. Rose Smith can't stand the_____ (主张,想法) that old people can't be beautiful.

8. When people go to visit Xinjiang, they will taste (品尝) the _____ (特色) there.