It’s quite strange that the man sleeps withhis mouth ____ and his eyes _____.

Can you watch TV ________ school nights—Yes, but I have to be _______ bed ________ten o’clock.

The rare species which are ____ disappearing should deserve more attention from us human beings.

Sstudentsgot injured or killed while in school. .

Radium salts, which have been found to _____ in bones, give rise to cancers of the bone.