21. In ____ review of 500 people, American researchers found that men and women who ate eight key foods daily cut the risk of _____ heart disease by 76%.
A. the; a B. /; a C. a; / D. a; the
22. ____ the pressure from work, teachers have to deal with psychological problems caused by inter personal relationship.
A. As far as B. As long as C. As well as D. As soon as
23. The man's first two ____ paintings are now on exhibition in the museum.
A. little red oil B. red little oil C. oil red little D. little oil red
