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.

硬铝导体的最大允许应力为（）MPa。

A.70

B.90

C.110

D.140