The number of teachers in our school _______ greatly increased last term.A number of teachers in this school ______from the countryside.

—How much shall I pay for the phone call? —You________. This is free of charge.

(2013·江苏南通市二模)We ________ have hurried all the way to the airport — the flight was called off because of the foggy weather.

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

—Is Mary coming by plane?—He should ,but he _____not. He likes traveling by train.