The students are r() money to help the homeless dogs.My brother has a() been to BeiJing twice.
问题描述：
The students are r() money to help the homeless dogs.My brother has a() been to BeiJing twice.
答
The students are (raising) money to help the homeless dogs.学生们正在为了帮助无家可归的狗而（筹集）资金.【raise money to do sth.】筹集...