1£®The doctors insisted that the boy       (operate) at once.

´ð°¸£ºshould be operated

2£®It’s high time that the local government       (pay) attention to the air pollution.

´ð°¸£ºpaid

3£®If I were you, I        (offer) her some advice on it.

´ð°¸£ºwould offer

4£®Without your help, he       (finish) the task so early.

´ð°¸£ºwouldn’t have finished

5£®If you       (work) harder at school, you would be leading an easier life now.

´ð°¸£ºhad worked