It was in the lab ______ was taken charge of by Professor Harris _______ they did the experiment.
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.
It was reported that 115 miners__________ in the flooded mine for eight days were pulled out alive at last.