21. 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
22. 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
23. He always did well at school ________ having to do part-time jobs every now and then.
A) in spite of B) regardless of C) on account of D) to case of
24. ________ receiving financial support from family， community or the government is allowed， it is never admired.
A) As B) Once C) Although D) Lest
25. All the key words in the article are printed in _______ type so as to attract readers‘ attention.
A) dark B) dense C) black D) bold
21-25 BBACD