My friend went on an ____________ to the Amazon to find out about the exotic birds that live there.
expedition
You need to _______ _____ for your flight before you go.
check in
We had to _________ _________ for ages at the airport. There were fifty people waiting!
queue up
In English you get in a car but you ________ ______ a plane, train, boat or bus.
get on
Lots of people go on a bus _______ when they go to London.
tour
