1 . We have reached a stage ________ we must start taking effective measures to protect the environment so as to save ourselves.

A．when

B．why

C．that

D．where

5 . ______ made him satisfied was that his students were able to read, speak and write in English, and they became more confident in learning.（用适当的词填空）

6 . Only when I left my parents for Italy ______ how much I loved them.

A．did I realize

B．I realized

C．had I realized

D．I had realized

7 . 假定英语课上老师要求同桌之间交换修改句子，请你修改你同桌写的以下句子。句中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏词符号（^）。并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下面划一横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均仅限一词；2. 只允许修改10处，多者（从第11处起）不计分。
1. My son, who is a 18-year-old young man, now is a university student.
2. The experiment was much more easier than we had expected.
3. It’s me who am the winner.
4. Three-fourth of his money has been spent in buying expensive clothes.
5. I listened to a story was told by an old woman.
6. He had an astonishing look on his face when he heard the news.
7. These documents are not accessible by the public.
8. He studied hard every day aimed at passing the exam.
9. About 80 percent of web traffic are in English.
10. My mum told me how to preparing it.