One thing in my home that I couldn't live without is air conditioner. Now, the weather in Korea is too hot. So to live in this weather, I really need to it. If I can't use it, my condition will be very sensitive and angry every day. Therefore, air conditioner is essential for me.

Hi Kara!^^ 

Bed is something I can't live without!

I can't sleep anywhere; I can only sleep in bed. 

Andrea 

One thing in my home that I couldn't live without is air conditioner.

>> One thing in my home that I couldn't live without is an air conditioner.

Now, the weather in Korea is too hot.
>> Korea's weather is scorching hot.  

So to live in this weather, I really need to it.

>> So to survive this weather, I really need it. 

If I can't use it, my condition will be very sensitive and angry every day.

>> If I can't use it, I will be in a bad condition, sensitive, and angry every day. 

Therefore, air conditioner is essential for me.

>> Therefore, the air conditioner is essential for me.