In the cafeteria, I saw my sister and her threefriends, none of ____ I had ever seen before.

We should keep our eyes _______ while doing eye exercises.

_____ we choose healthy food for our main meals, we probably still need to exercise now and then

_____ is no doubt _____ John’s knowledge of first aidsaved Ms Slade’s life.

You had better book rooms at the hotel in advance you should find no room on your arrival.