None of them had expected that the middleaged engineer died______his design uncompleted[ ]

e President Xi Jinping appeared at the Sochi Olympic opening ceremony, ______ China’s strong support for the Olympics and Russia’s efforts to host the Games.

It’s important for students to obey traffic rules.—Sure. Teachers always warn us ________ on the road because it’s very dangerous.

The weather in London is so changeable that peoplealways take their umbrellas with them ____ rain

The pay is not good, but people usually find social work _____ in other ways.