单句语法填空
1．Mount Vesuvius had not erupted for centuries, so the people of Pompeii felt that they were in (safe)．
safety 解析：句意：维苏威火山几个世纪以来都没有爆发过，所以庞培的人们感到他们是安全的。in safety意为“安全”，是固定短语。
2．The Theater District is a popular tourist (attract) in New York City.
attraction 解析：句意：剧院区是纽约一个很受欢迎的旅游胜地。设空处作is的表语，其前有不定冠词a及popular tourist修饰，应用名词单数。
3．At first people there found the Chinese and their work very strange. My father often saw people running after trains out of (curious)．
curiosity 解析：句意：起初，那里的人们发现中国人和他们的工作很奇怪。我父亲经常看到人们出于好奇而追赶火车。介词of后应使用名词，此处是短语out of curiosity“出于好奇”。
4．The boy gave his classmate a (describe) of what he had seen on his way to school.
description 解析：空格前有不定冠词，空格后有介词of，故此处填名词。
5．People who are farsighted can see things that are far away, but they have difficulty in reading a book unless they hold it at an arm’s (long)．
length 解析：此处表示除非放在一臂远的距离外。因此此处是跟在所有格arm’s后，名词的所有格修饰名词，所以此处应填名词length。
