Select the option that will improve the underlined part of the sentence. In case no improvement is needed, select 'No improvement required'. The river overflew its banks and flooded the village.

Find the part of the sentence that has a grammatical error: 'I came to invite you to my poor house and offers you my service.'

Find the part of the sentence that has a grammatical error: 'Yesterday afternoon we have been steaming over a summer sea.'