1.It is a ruler 、(改为否定句) 2.call ,Tom ,please ,at ,821_0359 （连词成句）
3.This a pencil .(改为一般疑问句)4.Is that her book (做否定回答)5.not ,is ,my ,it ,backpack .(连词成句)6.This is （a pen） in English .(对括号部分提句)7.It is a ruler .(对括号部分提句)