根据句意及首字母或汉语提示写出单词。
The house was e       at 50, 000 yuan, which made the owner very upset.
Have you seen the news that a scientist c       that their team had made a major breakthrough in the struggle against AIDS?
The machines will c        with the quality in the contract.
When he was on the train, he liked to listen to the         （咔嗒声）of the rails.
Yesterday at the party Jack and I w       to a room to have a private talk.
The direction given by the map is very         （清楚明白的） that you can get to your destination easily.
This article a        the possible measures to be taken to protect the environment.
The captain of the Titanic did not want to a       the passengers when he first knew the ship had crashed into an iceberg.