These tools are useless now,_____ A.are they B.aren’t they C.is it D.isn’t it
问题描述：
These tools are useless now,_____ A.are they B.aren’t they C.is it D.isn’t it
答
谁会做啊19.These tools are useless now,_____ A.are they B.aren’t they C.is it D.isn’t it
答：B
译：这些工具现在没有用,不是吗?
析：考查反意疑问尾句,前面的肯定句,后面的尾句用否定式.
否定句的标志是句子中有否定的副词(not,never 等等）而useless是一个形容词,只不过是名词use后加了个否定的后缀而已,它的否定句形式是：These tools are not useless.