历年托福考试语法真题全面解析25

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1. Quasars __________ emitting extremely intense radio waves and visible radiation.
, y; y8 I2 `) n/ F6 c) e( a- a(A) Star-like objects are
(B) Star-like, they are objects
(C) are star-like objects
$ p% B) b- \1 `) x& o5 l(D) are they star-like objects
4 s( z$ A9 d) }: `7 V# s: I1 I  
答案：C
测试点：主谓结构.
分析：Quasar是主语，后面缺少动词及动词后所带成份，应在答案中选择动词十宾语或系动词斗表语的结构．(C)是系表结构.
) N8 k7 b' R/ M0 q$ J( V解题要点：在4个答案中首先寻找以动词开头的形式.
  
' |) n2 C+ w& G2 \5 d0 [5 @- `2. Mary Cassatt specialized __________ mothers with their children.
(A) painted
(B) who painted
1 I, M3 z" x" M5 B% S4 Y& ~(C) paintings
$ o4 R3 ~; g" Q4 W: O* ~0 U9 D(D) in painting
  
8 w( B" U! K5 p- W( E) p9 M答案：D
8 }. V- O: O( g测试点：习语。
- C) T/ F  d% O! _+ C1 J分析：specialize是不及物动词，后面不能直接加宾语，而要用介词。答案中只有(D)有介词，故选(D)．specialize in+名词／动名词是固定短语.
  
3. Gorillas are quiet animals, __________ they are able to make about twenty different sounds.
9 _) z9 @" ]0 x1 O(A) how
(B) in spite of
9 Q0 P1 Z2 c2 D1 h4 K4 t(C) because of
+ D) C0 P4 s( u. ^0 N(D) even though
  
1 G( n0 r- h; y答案：D
测试点：连词.
分析：逗号前后为两个主谓完整的句子，且是转折的关系，要用表示转折的连词连接．答案中只有(D)even though是表示转折的连词。(A)可以是连词，但无转折的意思；(B)(C)都是介词，不能连接句子.
解题要点：TOEFL结构题中的even though常常是首先要考虑的选择.
  
. x6 A: T0 ?1 a2 s/ Y4. From 1946 to 1949, __________ William Henry Hastie served as governor of the Virgin Islands.
4 ~! Y. P( ?( t8 V(A) the lawyer
( t: d7 Z" }. T- ?5 _(B) he was the lawyer
(C) the lawyer who
(D) was the lawyer
7 T6 ?  D  L; O/ _& @) X! Y* n! w  
! `, F9 p; D' K; J# f答案：A
测试点：同位语。
9 R9 u7 z9 r3 o* M7 y7 l1 v+ p+ t分析：空格后是一完整的句子，主语前所缺的是主语的同位语。应在答案中选择说明主语身份的名词，即(A)．(B)是句子(C)后加从句(D)是系表结构，都不能作同位语.
  
5. __________ struck, a tuning fork produces an almost pure tone, retaining its pitch over a long period of time.
(A) When is it
(B) One is
(C) When it is
: V6 D' A2 E0 H% E8 d(D) Is one
  
答案：C
测试点：状语从句.
6 W- x2 o2 M% I; W) y% q: s! B7 v分析：本句逗号后是一完整的句子，逗号前的部分为状语从句．应在答案中选择带有连接词的从句形式，即(C)．其实(C)省去it is，只保留when struck亦是正确的.