1. When ---in arctic regions, the Aleuts construct igloos as temporary winter shelters.
$ p& P4 ~/ Q6 m* R/ Q(A) travel ' \9 q0 A" J+ U( I! V
(B) to travel
& d: O5 C3 v, ~3 n" B' {7 F(C) traveling them
7 B9 z9 d+ ], |( U1 j) ^(D) traveling 1 t& g7 [8 I; K9 ?1 p, h7 t
7 ?; W- ~. V+ `
答案：D # f: t/ R3 D& j; D4 J h7 Q
测试点：省略句。
/ u3 X/ h3 L! O# J3 g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. : J' C2 \( |6 _. C
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。 , W+ Q/ P/ d M) W0 Z, _+ q! R
( S! N0 w9 h2 d( Q2. Most substances contract when they freeze so that the density of a substance’s solid is ---of its liquid. @3 g$ m2 d+ ~( `, b; l" U& o
(A) than the higher density
/ T/ h/ H7 F) E! b& B K% ]0 R(B) higher than the density
) O7 E( }, l( T/ t U# {3 i; Q(C) the density is higher than that # U) R) Y4 W5 G, T U
(D) the higher the density
6 k* D3 M: T( G% h" ?; k6 _
9 H4 O0 ^7 ^. L: J. \2 ]答案：B : S) l+ y9 Y5 i& W* T
测试点：比较级／词序.
9 K0 c E$ {. S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. 4 b2 u5 B' [+ P+ o) V8 D
; N1 W4 T* S4 p% S l+ p& C& C3. The mechanism by which brain cells store memories is ---clearly understood. * E Y! D5 @+ x1 @. d v
(A) none k L% W' a! e4 J
(B) no 6 m+ ~' G+ U* a1 w2 b
(C) not
4 d' Y `- }& m- e. I(D) nor ( P1 a/ Q+ v& j0 b4 `& h
" S. J; ?8 ]# @. t, s5 `
答案：C " K& {; U* f2 Y
测试点：否定词.
/ _: q1 K% X3 I) z. y分析：否定动词要用副词not.
' D' E0 _( u$ T' b% s5 w . ?$ b# }3 C8 E1 V+ b
4. Desert animals ---a means of retaining moisture in such a hot, dry climate if they are to survive.
& J# d+ @# w3 M6 F$ U(A) need % o: f; |0 D2 q. ?5 j5 V
(B) needing
! x. o+ e t; T- ~7 j& }' ~: o2 \( [(C) to need i8 N [# M3 ?$ ~4 ^
(D) was needed
$ D: v; u4 x$ A5 V
; ]' T$ B8 E9 l- j答案：A + q7 z2 R! [9 ? V- Z6 O' r) E4 D
测试点：谓语.
& ^( V- B9 P2 O' m% y0 g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。 " p8 R" F% ]% r- A
) w; ]; S; k2 h5. ---state of Wyoming is also known as the “Equality State” because Wyoming women were the first in the nation to vote.
7 v8 {( A4 ]; i6 y. U8 S9 T(A) The
/ e) |1 z5 d: T( c$ [6 Q(B) There is a
6 x) t% b9 \( w(C) That the
) t# b! \1 `& A( u(D) As the
) _6 k/ Z7 N0 ]% K' p, S
5 z% ~ F5 r1 o答案：A
' v4 C+ A! x' c. {1 t$ `. U6 i2 `7 f7 W测试点：冠词.
1 @ L1 s( d9 ^1 Z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. |
发表于 2012-8-14 22:34:35
