Ⅰ.单词拼写
1．Their company has undergone steady expansion(扩大)recently.
2．He found a suitable place, dug a hole and buried (掩埋)the bag in it.
3．Snow forced many drivers to abandon(丢弃) their vehicles.
4．Careful examination of the ruins(废墟)revealed an even earlier temple.
5．My niece has always loved looking at the stars，so now he studies astronomy(天文学)．
6．They have the power to dismiss(开除) civil servants who refuse to work.
7．Environmental damage threatens the whole of civilisation(文明)．
8．He decided to devote the rest of his life to scientific investigation(调查)．
9．The most notable (显眼)example is his analysis of the functions of the family.
10．They are a little worried to set out a journey into the unknown(不为人知的地方)．
