III.Rewrite the underlined phrases in the following text, using question words + to-infinitives. In our Life Skills lesson last week, our class had a visit from a Fire Safety Offi cer, and this is what he told us: ‘Today I’m going to tell you (1) what you should do in case of fire. If there is a fire, keep calm. Be sure you know (2) where you can fi ndthe nearest exit or stairway. Do not use the lift. Before you leave, close all the doors behind you. You should know (3) how you could activate the fi re alarm, and then shout ‘fir e’. You should know (4) what number you should call to report the fi re and ask for help. In Viet Nam, it's number 114. The number is toll-free and you can call it any time from either a mobile or a landline without dealing area codes.’