完成句子（共20空，每空0.5分，满分10分）
汉语和西方语言不同，区别在于它不使用字母，而是使用方块字。
The Chinese language _______ _______ Western languages _______ _______ it uses characters instead of an alphabet.
汤姆几天没来学校了，结果弄明白他发烧病倒了。
Tom has been absent from school for several days, and it _______ _______ that he has _______ _______ with fever.
令我们感到困惑的是，虽然看不见人，但是却一直听到人说话的声音。
_______ _______ us was that though there was no one _______ _______, we could always hear someone talking.
与大多数人猜测的相反，这种疫苗要到明年才会得到广泛使用。
_______ _______ what most people may assume, this vaccine(疫苗) won’t come _______ _______ use _______ next year.
对树木的砍伐导致了楼兰这座古城被沙尘所掩埋。
The trees were cut down, which resulted _______ the city of Loulan _______ _______ by sand.