【题目】改错题。
1. How many cat?
____________________
2. I have four ruler.
____________________
【答案】1. cat改成cats 2. ruler应改为rulers
【解析】
1. How many cat?应改为:How many cats?
2. I have four ruler.应改为I have four rulers.

【题目】改错题。
1. How many cat?
____________________
2. I have four ruler.
____________________
【答案】1. cat改成cats 2. ruler应改为rulers
【解析】
1. How many cat?应改为:How many cats?
2. I have four ruler.应改为I have four rulers.