2010年12月CET4翻譯答案（恩波版）：
87. To ensure that he attends the meeting
88. is said to have been built
89. without the unique environment of the earth
90. What impressed the tourists most
91. I return the book to the library
87. To ensure that he attends the meeting
88. is said to have been built
89. without the unique environment of the earth
90. What impressed the tourists most
91. I return the book to the library