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

The volcanoes that raised the islands are still （ ） places.

I’m not used to （ ） in that impolite way.

Many teenagers feel no difficulty （ ） computer.

One’s life has value （ ） one brings value to the life of others.

The department head insisted that he _____ absolute authority to regulate office work.

The tribe had been living in that part of the area for generations until the civil war ______.

He （ ） by his sister at that moment.

—Did you enjoy the party? —Yes. We （ ） well by our hosts.

Although _____ ten years ago， the machine is still in good condition.

In this workshop, the output of July was three times （ ） of January.

He studies so hard to avoid （ ） at the bottom of the class.