The traffic rule says young children under the age of four and           less than 40 pounds must be in a child safety seat.

The professor has received the letter ____ to give a lecture in frication Institute.

—Would you like me        the radio a bit?—No, it’s all right. I’m used        with the radio        .

 Though I have often heard this song _______. I have never heard you _______ it.

The way she thought of _____ enough money was to sell her hair.