Neither Mary nor I_____ a worker.

Not until he met with the difficulty _______ the importance of group work.

24The Niagara Waterfalls, ______ is shaped like a semicircle, are 670meters wide, and fall 56 meters in an awesome white sheet of water

rom it until you have a deep under, standing of it,however.

live in the country or have ever visited there, ______ are that you have heard birds singing to welcome the new day.