Emergency line operators must always _____ calm and make sure that they get all the information they need to send help.[ ]

What_____Mike_____last Saturday night

the office work, he came to thesitting room and relaxed a while.

terviews are carried out ___ face to face in four cities including Hangzhou, Ningbo, Wenzhou and Shaoxing in Zhejiang province every year.

Mary wrote an article on the team had failed to win the game.