各位英语达人看看下面几个句子改错.

题目

各位英语达人看看下面几个句子改错.
1.A child as he is,he konws a lot of things.
2.The fook and knife are used to eat meat in some countries.
3.Two thirds of the earth are covered with water.
4.The twins are heading to ShangHai.
5.When and Where to build a factory are not decided yet.
我改的是：
1.把as提前,As he is a child,he...
2.把are改成is
3.把are改成is
4.把are改成is
5.把are改成is
可以改多处

答案

第1个把as改成though
第2和3个改对了
第4个的话应该是to改for吧
第5个的话when and where to build a factory has not been decided yet.不确定单复数