You’d better take another flight to New York , for the AA 505 Flight ______ have been cancelled. But you should call the airport to make sure. 

(2013·合肥一检)According to the rules and regulations, all payments ________ be made in cash in the shopping center.

 — Do you know where Mary is? I couldn’t find her anywhere. — Well . She        have gone far—her coat’s still here.

—Can I go to the park, Mum?—Certainly. But you ______ be back by six o’clock. 

－What do you think of the talent show in our school?－ I think teachers in Grade Two were ___________ act _____ all.