Each of the following sentences has one mistake. Identify and correct the mistakes.

I was listening to the radio last night when the doorbell rings.

Each of the following sentences has one mistake. Identify and correct the mistakes.

She is looking forward to go to Europe after she finishes her studies at the university.

Each of the following sentences has one mistake. Identify and correct the mistakes.

We are made doing all the cleaning in the house.

When did you buy this house?

-> How long ___________________________________?

He has lived in Hanoi since he was 12.

-> He started ___________________________________.

How long have you learnt French?

-> How long ago___________________________________?

They built this house last month

-> This house ___________________________________.