Fill in the blanks with appropriate modals:

(i) We???????? obey our teachers,
(ii) She??????????. pass this time,
(iii) He???????. not buy a car.
(iv) He works hard lest he???????? fail.
(v) Do you????????. cook your own meal?
(vi) The villagers???????. use kerosene lamps a few years ago.
(vii) The old lady????? take a bath every day before taking meals,
(viii) She??????.. finish this work before I go.
(ix) Ramesh said that they?????.. report for duty on Monday,
(x) We??????????.. prepare our lessons well before the examination.
(xi)They will??????? clear all the doubts before the starting of the meeting.
(xii) You?????????? not litter the classroom.
? there is no Modals opt so I am putting it in a random category