第四部分： Part A 单词拼写（每小题1分满分10分）
71.This year, scientists will test another 60_____（志愿者）and will be in a better position to explain the results.
72.Cancer is one of the_______(致命的)illnesses in the world.
73.I wonder why English is a language with so many c______ rules.
74.Confucius was born in China and lived from 551 BC until 479 BC. He greatly i_____ the development of China’s culture and education.
75.By the latter half of the 14th century, English was ______(采纳) by all classes in England.