Questions

‘Unless’ is used to denote the condition i.e. ‘If’...... ‘Not’. So, again the use of negative word ‘not’ is superfluous. So, the phrase, ‘are not very’ needs to be replaced with ‘are very’ to make the sentence grammatically correct. Thus, the correct formation would be, ‘Unless, you are very careful, you will run into debt’.

In MS-Word, the Ruler function helps align the text, graphic, tables or other elements in your document.

Mesopotamian Civilization (4000 BC - 6th Cen. BC)

Egyptain Civilization (3400 BC - 1000 BC)

Harappan Civilization (2500 BC - 1750 BC)

Chinese Civilization (1765 BC - 250 BC)

A bottle has a neck but no head and wears a cap.

An electric charge always flows from a body at higher potential to a body at a lower potential irrespective of the amounts of charges contained in them. In the question , no current flows. So there is no potential difference. 

‘Poetry’ needs to be replaced with ‘Poem’ to make the sentence contextually correct. ‘Poetry’ is a literary work; ‘Poem’ is a piece of writing. Here, the writing is being talked about. Thus, the correct sentence would be, ‘The writer of this poem is Wordsworth’.