overcrowded( 过度拥挤 ) historical( 历史 ( 学 ) 的 ) safety( 安全 ) apart from( 除 ... 以外 ) on schedule( 按时 ) mysterious( 神秘的 ) shopping mall( 大商场,大型购物中心 ) countless( 无数的 ; 多得数不清的 ) 1. I happened to meet him in the ___________ when I was busy shopping with my wife. 2. No one can tell what Mona Lisa’s __________ smile means. 3. I was told that the train from Beijing would arrive in Shanghai __________. 4. On a fine summer night we can see ___________ stars in the dark sky. 5. _________ a few small faults, he is a trustworthy teacher and loved by his students. 6. The young soldier jumped into the water to save the drowning boy without thought of his own ________. 7. He graduated from a university of science and technology but he has been engaged in _________ research. 8. Because of the traffic accidents on the main roads, the side streets were ________ with pedestrians and bikes.