Sentence Correction - General Questions

Choose the correct replacement for the part in bold. If no change is needed, choose "No correction required". I am knowing her for a long time.

Choose the correct replacement for the part in bold. If no change is needed, choose "No correction required". I wish I was there to help you.

Choose the correct replacement for the part in bold. If no change is needed, choose "No correction required". The children was playing in the garden.

Choose the correct replacement for the part in bold. If no change is needed, choose "No correction required". Please reply to my email as soon as possible.

Choose the correct replacement for the part in bold. If no change is needed, choose "No correction required". He returned back from Delhi yesterday.