not explode．

［A］ while
［B］ though
［C］ because
［D］ if

五、条件状语从句： 表条件的状语从句主要由if，whether，as long as (只要)，provided(只要) (that)等词引导，例如

10) Uniform acceleration occurs the rate of change remains the same over successive equal intervals of time．

［A］ according
［B］ if
［C］ with
［D］ under

11) Abstraction goes into the making of any work of art， or not．

［A］ whether the artist being aware of it
［B］ the artist is being aware whether
［C］ whether the artist is aware of it
［D］ the artist is aware whether

六、表示其他关系的状语从句，主要包括地点和行为方式状语从句

12) the Atlantic Ocean crosses the equator，the trade winds cause a flow of water to the west．

［A］ Where
［B］ And
［C］ That
［D］ At

13) Nails protect the ends of human fingers and toes protect the toes of most other vertebrates．

［A］ claws
［B］ as claws
［C］ as claws do
［D］ so do claws

七、状语从句中的“主语＋be”的省略：状语从句中的主语和系动词be常有同时被省略掉的现象，但需有两个前提条件

(1) 从句主语与主句主语一致，且从句谓语为“be”；

(2) 省略后的结构为“连词＋现在分词”、“连词＋过去分词结构”以及“连词＋介词短语”和“连词＋形容词(名词短语) ”结构，例

14) ，glasses can correct most sight defects in healthy eyes．

［A］ When well fitted
［B］ Well fitted when
［C］ Well fitted if
［D］ If well fitted when

15) Although rigid，bones exhibit a degree of elasticity that enables the skeleton to withstand considerable impact．

［A］ apparently
［B］ are apparently
［C］ apparently their
［D］ are they apparently

16) When in arctic regions，the Aleuts construct igloos as temporary winter shelters．

［A］ travel
［B］ to travel
［C］ traveling them
［D］ traveling

八、例题解析

1) D无论在语法上还是语意上均正确，而若选A和B，则只是两个句子的无谓罗列，这在英语中是绝对不允许的，而C是一个名词短语，也不符合

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