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.
9 }" v# ^( h1 Q8 X(A) Star-like objects are
" x8 K3 m# j. i$ H1 c(B) Star-like, they are objects
4 q2 ^! b6 J; o( \+ N# J+ A(C) are star-like objects
(D) are they star-like objects
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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.
解题要点：在4个答案中首先寻找以动词开头的形式.
  
2. Mary Cassatt specialized __________ mothers with their children.
(A) painted
* C7 a2 l9 Y/ q: D. s0 |(B) who painted
(C) paintings
(D) in painting
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答案：D
: @7 W, v  q7 h3 s, a1 g: L测试点：习语。
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.
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3. Gorillas are quiet animals, __________ they are able to make about twenty different sounds.
- z' A" @6 C# p(A) how
(B) in spite of
2 Y4 C0 B, o" T! X(C) because of
! e, w9 E0 D8 [4 N( A(D) even though
  
  Z& K5 b: ~4 s' G答案：D
测试点：连词.
: u5 V* Z% p9 k9 T' M- k0 _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.
  
  u* D" p+ G3 ~7 D. q! b4. From 1946 to 1949, __________ William Henry Hastie served as governor of the Virgin Islands.
(A) the lawyer
# p0 D0 ?! n3 B) C/ a3 U0 h(B) he was the lawyer
) [  x3 `5 T$ Z) C1 E(C) the lawyer who
% z- A) W: c2 a( z( r(D) was the lawyer
  
5 Y4 o/ X0 z: [答案：A
/ K  t) z3 W* p, Q) }( m) e测试点：同位语。
! y4 |" ]. m6 c+ w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.
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1 H* Z" k; B3 T6 v* m) ^" O# c5. __________ struck, a tuning fork produces an almost pure tone, retaining its pitch over a long period of time.
2 ?6 U6 ~* ~+ {3 p0 ~& x4 k(A) When is it
(B) One is
(C) When it is
(D) Is one
3 h& i- j% I$ x7 h4 N  
答案：C
% H4 |' k9 S, y' {3 B1 q4 S测试点：状语从句.
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.