Choose the correct item 1.when you travel __ a bus, don’t annoy others. a)on b)from c)at 2. it's safe to travel a)in b)on c)by 3.it isn't dangerous to travel plane a)on b)by c)in 4.the library isn't far so, i bike a)in b)by c)on 5.be careful when you cross the street foot a)in b)on c)by 6.always wear a seat belt when you travel a)at b)on c)in
