for to so up on

【1】What happened ________ your leg?

【2】I’m hungry, ________ I ate some food.

【3】We went ________ the hill.

【4】Daming and Lingling went ________ a bus ride last Sunday.

【5】The book is ________ the desk.

【答案】

【1】to

【2】so

【3】up

【4】for

【5】on

【解析】

略