This problem may lead to more serious ones if_______ unsolved.
Linda can't attend the party________ at Tom's house at present because she is preparing a speech for the party ________ at Marie's house tomorrow.
We slept with the light________ all night long last night.
________you the truth, she knows nothing about it.
-Who were those people with the flags? -A group________ itself the League of Peace.
Many teachers were praised at the meeting, Mr. Zhou________.