用所给词的适当形式填空。（10分。）
1.My brother is ______ (thin) than his classmate.
2.What would you like?  I’d like ________( buy) two kilos of peaches.
3.The       (two) lesson is much easier than the fourth one.
4.Ben and Benny are good at         (skate).
5.The boys            _ (run) in the playground now.

科目 英语   题型 填空题   难度 较难

知识点： 序数词 介词的辨析