托福考试语法精选精讲5

　　1. ______ in cases where special oxidants are used, fires are the result of a fuel rapidly combining with the oxygen in the air.

　　(A) There are

　　(B) Even though

　　(C) How

　　(D) Except

　　答案：D

　　分析：A , 逗号后面是主句，前面应该是从句或者其他成分，如果选A, 就有两个

　　主句了，肯定不对;B ,C 后面应该跟从句才对;D介词，也符合题义。

　　翻译参考：除了用了特殊氧化剂的情况下，火是燃料和空气中的氧气快速结合

　　的结果。

　　2. Maya Angelou's widely acclaimed autobiography, I know why the Caged Bird sings, is a moving and ______ of her childhood in segregated Arkansas.

　　(A) an account that is often humorous

　　(B) often humorous as an account

　　(C) often humorous, the account

　　(D) often humorous account

　　答案：D

　　分析：humorous和moving并列，修饰account，名词短语。

　　翻译参考：Maya Angelou广受赞誉的自传--我知道为何笼中之鸟歌唱，是他在种

　　族隔离的Arkansas生活的童年的感人而富于幽默的写照。

　　3. ______ to study element 104 because only a few atoms of his substance can be isolated

　　at one time.

　　(A) The difficulty

　　(B) Why it is difficult

　　(C) It is difficult

　　(D) Even though difficult

　　答案：C

　　分析：浏览全句，缺主句的主谓语，答案很明显。

　　A主句缺谓语;B，D 使得句子无主句。

　　翻译参考：研究104号元素是很困难的，因为在含有它的物质中只有少数几种原

　　子能够一次分离出来。