tongxun

1、D。not so as to
2、C。“that is ” can be omitted without influencing the whole meaning。
In C，the word“it”is the problem。However， this chioce is better than others。
3、B

tongxun

2、其中E的意思表达不清晰。
1、是考SO AS TO的。
3、D 后面修饰的东西似乎是修饰THEM的

tongxun

justag：
1、I do choose B of question 3。In my last page，I just want to explain why I did not choose D
2、According to question 1， I agree with your opinion that the right expression is “not so as to”