单项选择题A.They are less likely to run away.B.It’s easier for their masters to train them.C.They are less likely to be shy with human beings.D.It’s easier for them to form a relationship with their masters.
单项选择题A.Because it was more nutritious than other type of bread.B.Because it did not require yeast.C.Because it stayed fresh for a long time.D.Because it took less time to brake.