- Can I pay the bill by check? -- Sorry, sir. But it is the management rules of our hotel that payment ______ be made in cash.

This basketball team had lots of excellent players, so its fans never expected that it ____ have failed in the final. 

(2014·郑州一检)—Who is late for class again?—________you ask？Tim，of course.

He ______be lazy, but he can work hard when he feels like it．

—It's the office！So you ________ know eating is not allowed here.—Oh，sorry.