42.enthusiasm=zeal (a great enthusiasm)， fervency (sincere and enthusiasm)
43.quiet=tranquil(calm and peaceful)， serene(calm and quiet)
44.expensive=exorbitant(it means too expensive that it should be)
45.luxurious=lavish(impressive and very expensive)， sumptuous(grand and very expensive)
46.boring=tedious(if you describe something tedious, you mean it is boring and frustrating)
47.respect=esteem(if you esteem someone, you respect and admire him/her. FORMAL)
48.worry=fret(if you fret about something, you worry about it)
49.cold=chilly(unpleasantly cold)， icy(extremely cold)
50.hot=boiling(very hot)
51.dangerous=perilous(very dangerous, hazardous(dangerous, especially to people's safety and health)
52.nowadays=currently
53.only=unique(the only one of its kind)， distinctive;
54.stop=cease(if something ceases, it stops happening or existing)
55.part=component(the components of something are the parts that it is made of)
56.result=consequence(the results or effects of something)
57.obvious=apparent, manifest
58.basedon=derived fromcan see or notice them very easily)
60.quite=fairly