— Are you going to Beijing by air?— It’s fast, but expensive. So I’m not sure. I _____ take a train. 

 Haven’t I told you already that you ___ have my answer tomorrow morning?

It has been announced that all the candidates______ remain in their seats until all the papers have been collected.

Her sister ____ a taxi driver. Now she works for a charity.

According to the rules and regulations, all payments ________ be made in cash in the shopping center.