Security cameras are restricted to ________ spaces，such as hallways and exits.There will be no cameras in classrooms，locker rooms(更衣室)or bathrooms.

It was announced that only when the firewas under control ___ to return to their homes

aded with work, many doctors now get far less sleep than they _________.

Walk _______ the bridge and then turnleft ______ the right at the first turning .

Passengersarepermitted_____onlyonepieceofhandluggageontotheplane.[ ]