1．The witness (目击者) was telling about the whole accident.
2．Frightened by the sudden thunder and lightning, the dog sat trembling (颤抖) in a corner.
3．It's the duty of the police to preserve (维护) the public order.
4．That evening they gathered (聚集) in my house and talked till it was late.
5．It occurred (出现) to him that he should go to see a dentist.
6．We were discouraged (泄气的) at the news that he lost the game.
7．He had to abandon (放弃) his research for lack of funds.
8．The book assesses the significance (意义) of Stalin's policies between 1927 and 1939.
9．I had no_sympathy (同情) for students who got caught cheating in exams.
10．A water pipe burst (爆裂) and the entire apartment was flooded.
