21.[A] compatible [B]parallel [C] similar [D]identical
22.[A]Furthermore [B] However [C] Hence [D]Otherwise
23.[A]addition[B]brief [C]general [D] fact
24.[A]provided[B]since [C]whereas [D] though
25.[A]stages [B] periods [C] years [D]sessions
26.[A]location[B]position [C]situation [D]condition
27.[A]patterns[B]designs [C]stations [D]schemes
28.[A]variation [B]balance [C]frequency [D]stability
29. [A] small [B] few [C]rare [D]scarce
30. [A]operation[B]production[C] procession[D]action
31. [A] spending [B]planning [C] financing [D]saving
32. [A] expenditures [B]benefits[C]costs [D]profits
33. [A]expensively [B]consistently [C] periodically [D]cheaply
34. [A] conveniently [B]beneficially [C] advantageously[D]favorably
35. [A]on account of [B]in terms of [C]regardless of [D]in spite of
36. [A]Like[B]Except[C]Regarding [D]With
37. [A] application[B]endurance[C] expectancy[D]extension
38. [A]concentration [B] continuity[C] conformity [D]conductivity
39. [A]develop [B]differ[C]depart[D]derive
40. [A]interchangeably[B] immediately [C] intermittently[D]intensively