distractors: almost already always
sentence: When he reached home,he knocked at the door as he did not bring his keys.Surprisingly,no one opened the door.George  thought  his mother was in the toilet,so he waited for his mother.After a few minutes there was  [MASK]  no answer.Just as he was about to go to the nearby coffee shop where his father worked to  get  the keys,he heard the friendly voice of his neighbor,John.