书名：Longman
版本：
页数：
题目：
Millions of people are using cell phones today. In fact, in many places it is
actually considered unusual ______ use one.
(A) not (B) don’t (C) to not (D) not to
疑问：为什么是D而不是B
直接用助动词否定不行吗??
Don’t worry. Your father is ______ now. In fact, the rescue team
has rushed to help him out.
(A) in no danger (B) no danger (C) endangered (D) not dangerous
疑问: 为什么是A而不是D，我是认为直接接否定+adj不是会比较好吗??
还是说not要接在is+形容词之前??
以上两道问题，请益版上同学!!Thanks!!