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.
(A) Star-like objects are
9 ]& ]' u' }$ F* W* S2 u3 {, c4 ?(B) Star-like, they are objects
' h& I! j, P9 k7 A$ N2 D(C) are star-like objects
9 Y0 D+ F  y1 f(D) are they star-like objects
  
答案：C
测试点：主谓结构.
+ u: G+ }# F3 {  |& [/ e0 M" x9 q$ `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.
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2. Mary Cassatt specialized __________ mothers with their children.
* k8 Y4 }2 y& E# f6 ?(A) painted
. q/ L0 u! _( y/ E& d(B) who painted
6 h) q* X/ ^& A! `( D9 _(C) paintings
(D) in painting
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答案：D
$ F, O3 _+ ^# F$ P/ D测试点：习语。
- h( x5 [. f" j! M6 N* z- y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.
) y/ \# I+ ?9 ^  t) M! m" |, _% v(A) how
(B) in spite of
(C) because of
(D) even though
  
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.
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4. From 1946 to 1949, __________ William Henry Hastie served as governor of the Virgin Islands.
(A) the lawyer
(B) he was the lawyer
(C) the lawyer who
(D) was the lawyer
  
答案：A
/ x( k9 X: O5 Y$ {7 e# e0 F. G测试点：同位语。
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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0 J# R4 p4 i$ g- i0 y3 W: d! g5. __________ struck, a tuning fork produces an almost pure tone, retaining its pitch over a long period of time.
/ j, k1 a& a9 B9 q" q(A) When is it
(B) One is
(C) When it is
(D) Is one
  
. j+ H# [0 D2 i( x, E答案：C
& K$ h  s$ M9 J- H$ K5 m7 `测试点：状语从句.
9 B; ~) B) L5 ~7 T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.