Special ramps for picking up and ..... passengers are provided at the curbs of the arrival and departure floors of each terminal. (*) dropping off (*) dropping out (*) dropping behind (*) dropping in
This is a companion discussion topic for the original entry at https://english.best/questions/6210,special-ramps-for-picking-up-and-___-passengers-are-provided-at-the-curbs-of-the-arrival-and-departure-floors-of-each-terminal/