(1)The spiral threads of a spider*s web have a sticky substance on them ------- insects。
(A) traps
(B) trap its
(C) which traps
(D) which it traps (92.1)
［答案］ C 定语从句关系代词which引导从句，且在从句中作主语。
(2)Angiosperms inhabit relatively diverse environments and may be found ------- higher plants can survive。
(A) there
(B) wherever
(C) somewhere
(D) then (92.5)
［答案］ B 空格前后为两个完整的句子，这里应填入连接词联系主从两句。四个选择只有wherever是连词，引导地点状语从句。
(3)Duke Wellington was a composer. Conductor， and pianist ------ ranked as one of the greatest of all jazz figures。
(A) him
(B) although
(C) or
(D) who (92.10)
［答案］ D 关系代词who引导定语从句，并作从句的主语。
(4)-------。 Some of the Earth*s interior heat escapes to the surface。
(A) A volcano erupts
(B) A volcano whether erupts
(C) A volcano erupts it
(D) If a volcano erupts (93.5)
［答案］ D 从属连词引导条件状语从句。
