【推荐1】No one dislikes having weekends.That's ________on Saturdays and Sundays we can do whatever we like. （用适当的词填空）

【推荐2】If you stop a random person on the street in China, there’s a pretty good chance their surname will be either Wang, Li, Zhang, Liu or Chen. That’s _______those are the five most common surnames in China--shared by 30% of the population. And the vast majority of the population share just 100 of those surnames. (用适当的词填空)