6、The popularity of pseudoscience and quack medicines in the nineteenth century suggests that people were very----- but the gullibility of the public today makes citizens of yesterday look like hard-nosed ------.

A, cautious.. educators

B, sophisticated.. realists

C, rational.. pragmatists

D, naive.. idealists

E, credulous.. skeptics

pseudoscience: n.伪科学

quack: n.冒牌医生，江湖骗子

hard-nosed: a.1.(猎犬)嗅觉不灵的 2.执拗的，倔强的，顽强的，不屈不挠的 3.(美俚)精明而讲究实际的

sophisticated: a.老于世故的，富于经验的，精通的

rational: a.1.理性的，理智的，明事理的 2.合理的 3.神智健全的

pragmatist: 实用主义者

naive: a.1.天真的 2.幼稚的，轻信的 3.未有过经验的

idealist: n.1.理想主义者，理想家，空想家 2.〔哲〕唯心主义者，唯心论者

credulous: a.轻信的，易受骗的，因轻信而引起的

sceptic: n.1.怀疑(论)者 2.怀疑宗教(尤指基督教)者

伪科学和江湖庸医在十九世纪的风靡一时，表明人们相当轻信，但当今公众之如此易于受骗上当，使得昨日的公民看上去犹若精明实际的怀疑者。

7、Though extremely ------ about his own plans, the man allowed his associates no such privacy and was constantly ------- information about what they intended to do next.

A, idiosyncratic .. altering

B, guarded.. eschewing

C, candid.. uncovering

D, reticent. . soliciting

E, fastidious.. ruining