Must we keep the window _______ all the time? —No, you don’t have to.

Derek is a polite boy. Everybody in our class ________ him.

Why are you still here? It’s already seven o’clock.—Because I ________my work. Don’t worry. It’s almost done.

Whose notebook is this? Is it ______?—No, ______is blue and yellow,

What’s your speech _______, Dr. Smith?—Tomorrow you will get it. [ ]