定冠词。

　　6．scientifically　空格处修饰动词，故用副词形式。

　　7．where　分析该句结构可知，该句为非限制性定语从句，关系词在从句中作地点状语，故用where引导该定语从句。

　　8．construction　根据空格前的形容词"great"可以判断，空格处被形容词修饰，故用名词形式。

　　9．visitors　这里指"保证国内外游客的安全"，故用名词的复数形式。

　　10．hanging　句意：从远处看，这座桥就像是悬挂在江上方的彩虹。空格处与rainbow之间存在逻辑上的主动关系，故用现在分词。

　　Ⅱ.短文改错

　　Dear Lisa，

　　I'm glad to receive your letter asked about the present holiday life of Chinese students. Learning together with entertainment still take up most of our time. Besides, we often help our parents with the housework or farm work, that makes us realize how hard we work every day and develop a great love for work. Meanwhile, we take active part in social activities, such as voluntary work. We went out to the streets to collect rubbishes or to the hospitals to cheer up the sick children. We try our best to help those who are in need or make our hometown a lot of more beautiful. We find greatly pleasure in these activities.

　　Yours，

　　Li Ming

　　答案：第一句：asked→asking

　　第二句：take→takes

　　第三句：that→which; we→they

　　第四句：take后加an

　　第五句：went→go; rubbishes→rubbish

　　第六句：or→and; 去掉of

　　第七句：greatly→great

　　Ⅲ.书面表达

　　(2018·云南省第一次高中毕业生复习统一检测)假定你是李华，你和同学组建了一个名为"Starry Skies"的乐队。你的美国留学生朋友Mike擅长吉他演奏，请你给他写一封电子邮件，邀请他加入乐队。内容要点如下：

1．写信目的；