Choose the right modal verbs.
PASSENGER:Excuse me!(Should/May) I leav my trunk here?Will that be OK?
CLERK:I am afraid you(can't/shouldn't).You (should/can)keep your luggage with you.
PASSENGER:I (don't have to/can't)carry it round all the time.It is too heavy for me!
CLERK:You(are to/can)get a trolley.
PESSENGER:I(needn't/can't)see any.Where(should/can)I fide one of these trolleys?
CLERK:I am sure you will find some outside the main entrance.
PESSENGER:You (should/are to)be more polite and helpful to your clients.
CLERK:Well.It you wait for a moment,I will see if I(can/may)call a porter for you.
PESSENGER:Thank you,I really(can't/mustn't)have taken such a heavy trunk.