If/people/cycle/more/there/less/pollution->if people cycle more,there will be less pollution We/shouldn't/throw/rubbish/the street->we shouldn't throw rubbish on the street
could/robots/lift heavy things/some years ago->could robots lift heavy things some years ago?
rewrite the sentences so that they have the same meaning as the ones given:
The last time I saw him was in 2010(seen) => i haven't seen him since 2010