A. was made of cast iron

　　B. cast iron was made of

　　C. cast of iron was made

　　D. was of iron made cast

　　答案：A

　　分析：invented around 1742为插入语，2个was为并列谓语。be made of 为固定搭配。

　　参考译文：Franklin火炉发明于1742年，是用铁浇铸的，原先前面可以部分打开，而且设计成能正好装进壁炉。

　　8. A few species of mushrooms cause death or serious illness _________.

　　A. having eaten

　　B. that they are eaten

　　C. are eaten

　　D. when eaten

　　答案：D

　　分析：状语从句的省略结构。省略条件：由特定的状语从句引导词：although， though， even though， if， when， while， as， whether; 从句为主系表结构;从句主语和主句主语一致。省略方式：要同时省略主语和系动词。原句为：…… when mushrooms are eaten.

　　参考译文：吃了一些种类的蘑菇会造成死亡或重大疾病。

　　9. Some critics maintain _________ the mystery novel is a symbolic ritual of guilt and retribution.

　　A. is that

　　B. that there is

　　C. it is

　　D. that

　　答案：D

　　分析：that引导宾语从句。A，C中出现两个谓语动词，错;B中that引导的从句出现两个谓语动词，错。

　　参考译文：一些评论家认为神秘小说是罪与罚象征性的仪式

　　10. _________ all cherry trees are very attractive when in bloom， some species with inferior fruit are cultivated especially for their flowers.

　　A. Although

　　B. There are

　　C. It is

　　D. That

　　答案：A

　　分析：后面句子完整，且出现了两个谓语动词，此处缺连接词。

　　参考译文：尽管所有的樱桃树在开花的时候都很美丽，但它们中的一些不结果的种类专门种植用来观赏他们的花的。