—I hear you have an experience in the Royal Air Force. Is that ture?—Yes. I ______ in the Royal Air Force for six years. A. served B had served C joined D have joined
It was_____great shock to the world that two aero-planes crashed into ________ World Trade Center in New York o September 11th, 2001.
He began to __________ because every means _______ tried already.
It’s said that the old lady died ________.
_________ water to grow is well-known.
----What do you think of the film we saw last night? ----I feel ______ that the film is well worth seeing once more.