根据提示填空(每空一词)
After six months of ____ (train) with a dog at Animal Helpers, I was able to bring him home.
答案
training
知识点:普通名词-不可数名词

train放在本句中是“训练”的意思,但是介词of后要加名词、代词或动名词,所以train要变成名词形式training。

略
