下列加点的词语注音全对的一组是(　)

At the foot of the hill ___ surrounded by trees.

I was close to being killed the other dayA car passed me at ____ I thought was a dangerous speed

You look ______,Paul. What’s the matter?— I’m having trouble ______ math.

soon as the principal ______ thenews on the bulletin, the students began gathering in the school garden