Your father looks tired! — Yes, he worked for _________ after twelve o’clock.

I don’t like the color of this sweater. Would you please show me __ one?— Here you are.

Some peoplefeel sick when they read a book in a car or on a boat．

The water in this river is harmful because It’s a ______ river.

His mother was born in Greece, and Greek was her native language, ___.