He took refuge in the air-raid shelter.

He swallowed his saliva with a gulp, perhaps because he was nervous.

He was showered with vicious insults.

There are many cognates in English and German.

This software has compatibility with other programs.

She tried to persuade him with a wheedling voice.

The sum of our shopping was 5000 yen.

A googol is a large number that represents 10 to the power of 100.

The golden sunset reflecting off the sea was very beautiful.

Which category is this book classified under?