I

1.She is more intelligent than her sister

2.If he doesn't eat his breakfast he will be hungry

3.We can reuse bottles and cans

4.We shouldn't throw the rubbish on the street

II

1. I like watching TV

2.I have learnt English since 1999

3.You shouldn't stay up late

4.If we cycle to school everyday, we will keep fitter

she is mỏre intelligent than her sister(so sanh hon)

if he doesn't eat breakfast, he will be hungry(if 1)

we can reuse bottles and cans

we shouldn't throw in rubbish on the street

i like/love watching tv( like/love=enjoy)

i studied english in 1999(learn=stydy, hoac viet voiws thi hien tai hoan thanh)

remember not stay up late

viet voi if