Решить: " rephrase the following sentences in as many ways as possible."
1. i advise you to buy this book. should/ought to buy this
2 it isn't necessary for him to take the exam again.
3 i'm sure terry isn't at the office.
4 it is possible that janet will call me this evening.
5 you aren't allowed to eat and drink in the classrooms.
6 we are obliged to clock in and out every day.
7 i'm sure the boys weren't upset with the result.
8 would you like me to do anything to help?
9 perhaps we will go for a picnic on sunday afternoon.
10 sam managed to reach the top of the mountain after climbing for several hours.
11 how about throwing a party on your birthday?
12 it wasn't necessary for john to attend the seminar.
13 they are obliged to go to a meeting every week.
14 how about visiting some friends on saturday?