【推荐1】因此，当坐在教室做试卷时，我感到自信并且精力旺盛。
So while ______ in the classroom and ______ papers, I felt confident and was full of energy.

【推荐2】这里有众多美丽的古建筑，许多坐落于大山之族。城市、大海和金门大桥美景尽收眼底。
There are so many beautiful old buildings, ______big hills, offering great views of the city, the ocean, and the Golden Gate Bridge.

【推荐3】窗户旁边坐着一位年轻的女士，手里拿着一本书。(全部倒装)
___________________________ a young lady ______________________________.

【推荐3】While you are standing on a moving bus, you should _________ the bar in order not to lose balance. （用hold的相关短语完成句子）