根据括号内的汉语提示，完成句子。

1. Han Han has __________ (写) some popular novels in the recent years.

2. The young couple had great fun __________ (躺) on the beach in Hawaii.

3. The tourists from home and abroad lost __________ (他们自己) in the scenery

    in Mount Sanjiao last summer.

4. The more regularly you eat, the __________ (更健康) you are.

5. Qian Xuesen is one of the greatest __________ (科学家) in the world.

6. The __________ (第十二) lesson is the most difficult in Book Three.