16．A huge balloon is telling people in Paris how good or bad

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/24 16:48:35

16．A huge balloon is telling people in Paris how good or bad the air quality is．When it's good,the bolloon shines green．________,it's red．
A．When worse B．If bad C．Though terrible D．Whenever good
为什么选B却不能选A呢,不都可以省略么

good和bad这里表示好和坏的两种情况,worse表示的是比较,如果选a就成了空气好的时候和空气（比好）更差的时候.根据上文,how good or bad,应该明确的选择和good相反的情况,就是bad,所以是b,if bad.

16．A huge balloon is telling people in Paris how good or bad how to love?be a good person or bad? Is Internet Good or Bad? Is pressure a good thing or a bad thing? man is a good thing or bad thing? 英语作文 Is it good or bad for people to send gifts? Do you think____ humans is good or bad for people?（clone) In Paris ,people have such a good time that they don't mind Is being an idolater good or bad Graffiti is it good or bad Is the World Cup Good or Bad watching television is bad or good?