This book isn’t mine. ________can it be?

There _____ be any difficulty in passing the road test since you have practised a lot in the driving school.

–Is there an express to Beijing tonight? -- There ______be , but you’d better call the booking office to make sure.’

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

Tommy, you____ be hooked on the Internet all day. You may fall behind others in study.