内容正文:
选择性必修第二册练习
Unit 2 Bridging cultures
Learning About Language
基础演练
I.用单词的适当形式完成句子
1. To this day, there is some doubt _________ he shot himself or was murdered.
【答案】whether
【详解】
考查同位语从句的连接词。句意:到今天为止,他是开枪自杀还是被谋杀有一些疑问。分析句子可知,设空处后的句子是对名词doubt的解释说明,作doubt的同位语,应是同位语从句,从句中不缺少成分,意为“是否”,故填whether。
2. Surprisingly,______ began as nothing important in public affairs has grown into a social movement.
【答案】what
【详解】
考查主语从句。句意:令人惊讶的是,一开始并不是什么重要的公共事务渐渐变成了一种社会活动。此处为主语从句引导词,从句中缺少主语,指事情应用what引导。故填what。
3. Some people have the idea to cross Canada in less than 5 days, but they forget the fact _________ Canada is 5500 kilometres from coast to coast.
【答案】that
【详解】
考查同位语从句。句意:有些人想用不到五天的时间横穿加拿大,但他们忘了这样一个事实——加拿大东西海岸相距5500公里。分析句子结构可知,空后“Canada is 5500 kilometres from coast to coast. (加拿大东西海岸相距5500公里)”是同位语从句,对前面the fact解释说明,从句句子成分完整,所以空处需用that引导同位语从句。故填that。
4. ________ many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and riv