历年托福考试语法真题全面解析41

会计考友

1. When ---in arctic regions, the Aleuts construct igloos as temporary winter shelters.
(A) travel
(B) to travel
% ~- N: F; g7 M% K(C) traveling them
(D) traveling
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& {, j/ ^6 E( {9 c答案：D
测试点：省略句。
分析：引导状语成分的连词when可后接从句或亦可接分词。When+分词短语相当于从句省掉了主语和系词，即when(the Aleuts are)traveling in arctic legions．(A)动词原形和(B)不定式均不可与when连用作状语；(C)多了them.
: x& n0 L. h! h, }# M/ W9 D" s解题要点：时间状语从句的连词(when,while)后可直接加分词短语。条件是这一从句的主语应与主句的主语同一人／物。
7 ]5 C, K0 j( E' v  [  
* j# E7 [/ u" W5 `( D/ d7 E# i2. Most substances contract when they freeze so that the density of a substance’s solid is ---of its liquid.
(A) than the higher density
(B) higher than the density
(C) the density is higher than that
+ d8 P, h5 Y& G' C8 T' T3 v(D) the higher the density
  
答案：B
测试点：比较级／词序.
- p  ?1 l# i$ n* u1 P' Z; g分析：比较级的句式要求动词+形容词或副词比较级+than+被比较的成份，4个答案中只有(B)符合此结构.
  
; A0 j- y) ^/ y0 Z3. The mechanism by which brain cells store memories is ---clearly understood.
: v, `. V6 Q; O7 N6 Y1 l(A) none
# s. X; I0 R: l# z; \3 F( _" ~(B) no
(C) not
, z6 d% a! \: N(D) nor
  
7 `  G; K4 D  h) e8 g答案：C
* [! F3 w- [1 M. X: [5 U! G测试点：否定词.
7 x$ j& S0 i( z# D* B分析：否定动词要用副词not.
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4. Desert animals ---a means of retaining moisture in such a hot, dry climate if they are to survive.
3 w1 u$ y5 W; @. N& P& f* N(A) need
: N# E* b4 {9 j( y) |, }# t$ z(B) needing
0 Q0 D; ~" _$ q3 W& V- X(C) to need
/ l* \& C: y! d% P(D) was needed
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; n9 l- j6 O* W- |' U+ B答案：A
测试点：谓语.
分析：空格两边都是名词性成份，说明所缺为谓语动词．答案中(A)可作谓语．(B)(C)不能单独作谓语；(D)用了被动式，与句意不合。
  
5. ---state of Wyoming is also known as the “Equality State” because Wyoming women were the first in the nation to vote.
' g4 m  l% X+ O0 W0 N(A) The
(B) There is a
0 Q1 L% g( h- j$ H(C) That the
! K) I$ Y/ S  h  m! f9 H(D) As the
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答案：A
- @( i  j0 P* D* S" h测试点：冠词.
* g+ f+ \$ K4 X/ h3 @! R: `分析：空格后是一完整的复合句，空格内不可能填入带有连词或动词成分的(B)、(C)或(D)．这里缺少的是限定state of Wyoming的定冠词the.