Wild animals are our friends. We shouldn’t kill them ______ food or clothing.

Before the police arrived, the thief had turned the house

Have you ever been to Tibet?— YesI ____________ there three times in the year 2008

Have you been working in N0.5 Middle School since you graduated from college?~No, I _______ in the countryside for 3 years

It is dangerous _______ football on the road.