Hardly had the employees ________with their work when the rain stopped.

You look worried. What’s the matter —I _____ the exam yesterday.

(2014·安徽两所名校联考)A survey ________ by the UN shows developing countries are particularly attractive to tourists.

It’s reported that the Slender West Lake Tunnel _________ in 2015.

For a long time they walked without saying__word, Jim was the first to break ___ silence.