The first textbook（ ） for teaching English as a foreign language came out in the 16th century.

Michael’s new house looks like a palace, compared _____ his old one.

Air pollution is obviously one of the major _____ of city life.

It is important that the boy （ ） an adult to take care of him.

（ ） does it take you to wash all the dishes?

The tall tree, （ ） leaves are darker than those of the other two, is as old as grandpa.

When I got my first job, I _____ early. But nowadays I usually stay in bed until late morning.

The young man still denies _____ the fire behind the store.

It is four years since John （ ） school.

The idea sounds very good, but will it work in_____?

He （ ） yesterday morning, and would stay for three days.

Many teenagers feel no difficulty （ ） computer.