第三节展望词汇（共15小题；Ⅰ每小题1分，满分15分）
I根据英文释义填写适当的单词，单词首字母已给出。

51	s______________	adv.	attractively
52	s______________	n.	a very tall modern city building
53.	t______________	n.	a vehicle for passengers, whick travels along metal tracks in the street
54.	e______________	adj.	very big in size or in amount
55.	n______________	v.	to keep asking someone to do something,or to keep complaining to someone about their behaviour, in an annoying way