1.likely- probable or expected

2.grades - marks

3.overweight - great amount

4.dont allow - don't let

2.good side:there are many interesting shows and we can learn new information.you can watch it when you're bored.

bad side:time spent watching TV takes away from important things and maybe it waists of time.and for example sometimes children learn incorrect information from TV.people who often watch TV usually cannot tell the difference between the fantasies presented on television and real life

3.1.I have been to Britain several times

2.she has lived in Spain since 1994

3.they have been married for five years

4.I already have made coffee for you

5.bob never has had a bike