The teenagers usually have many problems at school, and they don’t know ________ them, so we should give them some help.

There are two buildings, _______ stands nearly a hundred feet high.

Tom, please get some inkThere is________ink left in the bottle— OKI will [ ]

_____ sleep every night is important for teenagers. _____, loss of sleep can make you feel tired, and even cause you to put on weight. [ ]

______ boy called Tom never tells lies. What ________ honest boy he is!