1 . The first time the teenager came here, he signed __________ for the advanced course for literature. (用适当的词填空)

2 . If you focus your mind ________ English, you will master the language. (用适当的词填空)

3 . I have offered to paint the house in exchange _________a week’s meals. (用适当的词填空)

4 . According to the regulation of the hotel, guests should check __________ of their rooms by noon.(用适当的词填空)

5 . I have no ambitions other __________ to have a happy life and be free. (用适当的词填空)

6 . We should not only know the theory but also know how to apply it ________ practice. (用适当的词填空)

7 . The old farmer’s wife sold eggs ______ exchange for salt in the market. (用适当的词填空)

8 . The company was named Gates Hall        a man named James Gates.

A．in need of	B．in memory of
C．with the help of	D．in search of