1我想要发明多功能笔，请帮我写这篇英语作文

2There is a park behing the shoe storeb。 变为一般疑问句

3These books are very cheap。改为否定句

4make out of 什么意思、怎么造句？

5暑假计划，用Iwilldo句型，5句话左右

6where are your pens?改为单数句.

7cake是可数名词还是不可数名字？

8改错：In the afternoon I did some baby-sittings, for it is a fun looking after children.

9I'm going to play football(变一般疑问句)

10以“How to protect yourself in a fire”为题，写一篇英语作文