( ) 21. If you don’t know a word, you must _______ the word in a dictionary.

　　A. look up B. look down C. look over D. look out

　　( ) 22. It’s time for class. We’d better _______.

　　A. stop to talk B. to stop to talk C. stop talking D. to stop talking

　　( ) 23. There was a strange sound outside. Mary went out and _______ around, but she _______ nothing.

　　A. looked; saw B. saw; saw C. watched; looked D. looked; find

　　( ) 24. The woman _______ the child quickly and took him to hospital.

　　A. put on B. dressed C. had on D. was wearing

　　( ) 25. –Oh, you painted the walls yourself?

　　--Yes. It was not hard. The whole work didn’t _______ much.

　　A. want B. cost C. spend D. pay

　　( ) 26. --_______ all your things, Tom! I hate them here and there. –OK, Mum.

　　A. Put up B. Put on C. Put down D. Put away

　　( ) 27. Yuki loves wearing strange hats because she wants people to _______ her.

　　A. believe B. control C. notice D. visit

　　( ) 28. _______! It’s the music of Mozart. Be quiet.

　　A. Hear B. Sound C. Sing D. Listen

　　( ) 29. –The room is so dirty. _______ we clean it? -- Of course.

　　A. Will B. Would C. Do D. Shall

　　( ) 30. We must do something to stop people from _______.

　　A. to throw litter about B. to throw litter into

　　C. throwing litter about D. throwing litter into