estar seguro
to be sure
hablar por telephono
to speak by (on the) phone
llegar a tiempo
to arrive on time
pensar en
to think about
ser imposible
to be impossible
ser seguro
to be safe
subir al ten
to get on the train
tomar asiento
to take a seat
to be sure
estar seguro
to speak by (on the) phone
hablar por telephono
to arrive on time
llegar a tiempo
to think about
pensar en
to be impossible
ser imposible
to be safe
ser seguro
to get on the train
subir al ten
to take a seat
tomar asiento