My mother ______ a farmer. Now she’s an office worker.

Have you seen______ pen? I left one here this morning.— Is it___________ black one? I think I saw it somewhere.

My father plans ______ me t o visit the Summer Palace this summer holiday.

There are _________of nurses in our school but only _______of them are boys.

How long did you stay at the party?— I only stayed there for ________ hour.