He was staggering because he was drunk.

He was blocking the road.

Iodine is an important nutrient for the human body.

Bromine is a reddish-brown liquid with a strong pungent smell.

Last night, I went to see a movie with my friends.

It takes twenty minutes to get to my house.

The pool water is disinfected with chlorine.

Boron is one of the elements widely distributed in the earth's crust.

Fluorine is one of the chemical elements, and its symbol is F.

Carbon is one of the basic elements of life.