Grammar: find the mistake

How is the name of your best friend? (One word is incorrect. Write the correct form)

Jane is looking thorough the window into the garden. (One word is incorrect. Write the correct form)

A daughter of your aunt is your sister. (One word is incorrect. Write the correct form)

It’s cloudy today, don’t forget to wear sunglasses. (One word is incorrect. Write the correct form)

This dress is half cost, buy it. (One word is incorrect. Write the correct form)

It’s not fare, mum! (One word is incorrect. Write the correct form)

You shouldn’t drink so much sugar, it is bad for your teeth! (One word is incorrect. Write the correct form)

My birthday is the three of August. (One word is incorrect. Write the correct form)

You mustn’t food animals at the zoo. (One word is incorrect. Write the correct form)

Bob is strong than Ted. (One word is incorrect. Write the correct form)