—Oh, ________ air is so bad. Shall I open the windows to let in ________ fresh air?—Ok, thank you.

My mother often cooks _______ for us.

The book is of great value. _______ can be enjoyed from it until you have a deepunderstanding of it, however.

The two girls are so alike that strangers find________difficult to tell one from the other.

The clean towels are in the drawer—if you need ____.