1、That young man still denies ________ the fire behind the store.

　　A.start　　B.to start　　C.having started　　D.to have started

　　2、________ in a recent science competition, the three students were awarded scholarships totaling $21, 000.

　　A.Judged the best　　B.Judging the best

　　C.To be judged the best　　D.Having judged the best

　　3、Without proper lessons, you could ________a lot of bad habits when playing the piano.

　　A.keep up　　B.pick up　　C.draw up　　D.catch up

　　4、Everything we eat and drink contains some salt; we can meet the body’s need for it from natural sources without turning ________ the salt bottle.

　　A.up　　B.to　　C.on　　D.over

　参考答案：

　　1、C　2、A　3、B　4、B