write the verbs in the correct from to make present simple

write the verbs in the correct from to make present simple or present continuous tenses. From the moment the passenger 1)...(book) a flight to the moment he finally 2)...(board) the plane? a great deal of work is done to ensure that all goes smoothly. Just making certain that the right number of passengers 3)...(board) the right palne 4)...(take) a lot of careful planning by the airlines. to get the passengers speedilyto and from the terminals, there must be networks of roads and railways, as well as huge car parks where people can leave their cars while they 5)...(be) away on business or holiday. at the check-in desks the passengers 6)...(present) their tickets to the clerks who 7)...(check) the booking with the airline computer. They next 8)...(weight) the luggage, 9)...(label) it for its destination, and 10)...(send) it off on a conveyor belt for loading. They then 11)...(issue) the passenger with a card for boarding the plane. While the passengers 12)...(wait) for their flight other people 13)...(be) busy at work making sure that the luggage they have just checked in is sorted and en route for the right palne. Out on the apron, the luggage 14)...(be) loaded on to the plane. The loaders 15)...(use) special belts which take the cases right into the plane39;s hold. At the same time the load control department 16)...(work) out how much fuel their plane will need for its trip, taking into account the total number of passengers and the weight of their luggage. And yet other airline workers 17)...(collect) information on their flights, so that departure boards and flight announcements are kept up-to-date. While they 18)...(wait) for their flight to be called, passengers sit in a lounge where they can have a drink and a meal. An electronic board 19)...(give) flight details and warns of delays. All modern airports 20)...(have) banks and shops for last-minute purchases. Before boarding every passenger must pass through a security check. The flight is called and the passengers 21)...(walk) to the airliner. The can be taken out by bus, or board through an enclosed pier which 22)...(link) with the plane door.