正确答案:

题目：指南针、造纸术、印刷术和火药，是我国古代人民的“四大发明”，其中发明最早的是指南针。（ ）

解析：×

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举一反三的答案和解析：

[单选题]30． —What did the teacher say just now?—Sorry． I didn't catch it． I __________something else．

was thinking

解析：30．C【解析】由“我在想其他的事情”这一动作是发生在刚才老师说话时，故用过去进行时。

[单选题]BJack is a famous writer now．But he said he was not a good student when he was young．He was often late for class and didn’t like doing his homework． Sometimes he slept in class while the teacher was teaching．He didn't understand much, but he always thought he under-stood everything．．

clever

解析：26.C【解析】由第一段可知Jack小时候并不聪明，也不勤奋，故选C.

[单选题]某气体由氢气、一氧化碳、甲烷中的一种或几种组成。点燃该气体后，在火焰上方罩一冷而干燥的烧杯，烧杯内壁出现水雾；把烧杯迅速倒转过来，注入少量澄清石灰水，振荡，石灰水变混浊。下列对气体组成的推断不正确的是

可能只有氢气

[单选题]22． Mary got _______on her birthday．

a cookbook

解析：22．c[解析】从第一封信的第三句话可知Mary得到一本烹饪书。

[单选题]AThe undersea world is very beautiful． Now more and more people want to dive in the water to find the secrets there． Scuba diving is a new sport today． It can take you into a wonder-ful undersea world．

they want to find the secrets of the undersea world

解析：21.B【解析】由第一段第二句可知

[单选题]41． —1 hear _________ your grandpa _________ your grandma like watching Min Opera．

—Right，just as many old people do in Fuzhou．

both，and

解析：41．A【解析】句意；——我听说你爷爷和奶奶都喜欢看闽南剧。——是呀，就像福州的许多老人一样。 both…and在句中连接两个相同的成分，再根据句中的谓语动词是like可知A项是最佳答案。both …ind…两者都} either…or…要么……要么 ……：neither…nor…既不……也不……；not only . …but also…不仅……而且……。如选D项，应将题干中的like变为likes。