Choose the right modal verbs. PASSENGER:Excuse me!(Should/May) I leav my trunk

Choose the right modal verbs. PASSENGER:Excuse me!(Should/May) I leav my trunk here?Will that be OK? CLERK:I am afraid you(can39;t/shouldn39;t).You (should/can)keep your luggage with you. PASSENGER:I (don39;t have to/can39;t)carry it round all the time.It is too heavy for me! CLERK:You(are to/can)get a trolley. PESSENGER:I(needn39;t/can39;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(can39;t/mustn39;t)have taken such a heavy trunk.