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

–Mum, must I wash the dishes right now? –No, you______.

The room is in a terrible mess; it ________have been cleaned.

These days some young people just ________ work hard because they have got used to the easy life provided by their parents.

I was really anxious about you. You _______ home without a word．