阅读下列文章，回答 21～40 题。 第 21 题

根据下列文章，回答 21～40 题。

第 21 题

根据下列文章回答 21～25 题：

第 21 题 Researchers in behavioral psychology are divided with regard to__________．

根据下列文章回答 21～25 题：

第 21 题 Details of the private life of an astronaut are hard to come by，because they are__________．

根据下列文章回答 21～25 题：

第 21 题 The best title of this passage could be__________．

阅读理解

根据下列文章，请回答 56～60 题。

第 56 题 The writer wants US to understand that a child____

根据下列文章回答 21～25 题：

第 21 题 Concerning the protection of privacy and increased surveillance of communication，the author seems to insist on__________．

阅读下列文章，回答 46～50 题：

第 46 题 Which of the following statements is NOT true according to the text？

根据下列文章回答 36～40 题：

第 36 题 According to some doctors and politicians，the amount of salt consumed__________.

根据下列文章回答 36～40 题：

第 36 题 The two Brooklynites in the first paragraph were__________．

根据下列文章回答 36～40 题：

第 36 题 How many new materials are mentioned in this passage？