21. A. growth B. decrease C. height D. diminish

　　22. A. slow B. increasing C. reducing D. fast

　　23. A. thought B. designed C. considered D. supposed

　　24. A. road B. method C. reason D. key

　　25. A. words B. slogans C. ways D. strengths

　　26. A. independent B. wealthy C. prosperous D. national

　　27. A. intensive B. thick C. narrow D. extensive

　　28. A. move B. apply C. reply D. demand

　　29. A. situations B. disadvantages C. opportunities D. conditions

　　30. A. few B. many C. honourable D. leading