Standing among the students ________ together with their English teacher.

Who should be responsible for the accident?–– The boss, not the workers. They just carried out the order ________.

It’s said that his father was attacked ________ a man ________ a knife.

Chicago isn’t so famous __________ Washington D. C. .However, it’s the third __________ city in the USA.

Korean star PSY’s “Gangnam style” video,________,has set the Guinness World Record for the most “liked” video in YouTubehistory.