--- What’s wrong with my son, doctor? --- ____________ serious, just a slight cold. He’d better drink some water.

--- What ________ useful book ! ---Yes, it is. But I found___________ difficult for me to read.

I like Britney Spears. She’s ________ favorite singer.

My little brother likes this kind of pizza. Please give him _______ .

These aren’t ________ cards. They’re_______