______ happened to be no one in that house when the typhoon hit the area.
The machine has been used for several years. It needs______.
Be quiet______you will wake the whole house!
—Are you still employed at the post office? —Yes,I______here since 1982.
_____a written permission, he had to write another letter to the president of the university.
--- How come your father can read books in German? --- Well, he____on a project with some German engineers for 3 years when he was young.