46. _A_ the calculation is right scientists can never be sure that they have included all variables and modeled them accurately. [variable n. 变项,变量;model vt. 建模] / {$ S; _. D' S# s6 Q8 F& g
A Even if B As far as C If only D So long as + q2 K6 R: w8 \* i$ G
even if 即使,即便; so long as (后面加句子时)只要。
$ N% _$ A) ~. Z7 F M47. My train arrives in New York at eight o’clock tonight. The plane I would like to take from there _B_ by then. % M4 Y3 N+ b" }9 V+ J* v
A would leave B will have left C has left D had left
# M) r: d: e* o" m9 R. d9 s: i0 T将来完成时:will have + 动词过去分词。 0 B% A v3 O8 k0 ?( {1 v+ p
49. Harry was _A_ by a bee when he was collecting the honey. " q9 t# \1 S5 z9 _6 d9 T e1 d7 }! y
A stung B stuck C bitten D scratched 3 h$ ~1 g3 ^1 k0 n( H6 M$ v
sting v. (蜜蜂)叮,蛰; bite v. (蚊子等)咬; scratch vt. 抓伤,划破(通常指猫抓人)。
; k- w, d8 H( |once bitten, twice shy. 一朝被蛇咬,十年怕井绳。 - M! R9 n* }# b4 Y! H
50. The thief tried to open the locked door but _B_. - Q& X+ ~ o. x8 R" \
A in no way B in vain C without effect D at a loss
- `, n* d! R. T2 C% S; Win vain 徒劳,白费工夫; But很少与介词without联用; at a loss 不知所措。 + y5 l: \. v8 Y$ | I# R# j3 {
52. _B_ seeing the damage he had done, the child felt ashamed. 3 D; m6 Z5 j5 @0 u8 s
A By B On C At D For
" i6 t r* ^, r% `5 U' k" Won后面加动词ing形式表示“在…之后”这个时间概念。
, {& E( f7 _4 d w/ P* @54. Research findings show we spend about two hours dreaming every night, no matter what we _C_ during the day.
, s, M+ t" ?4 n" \) S/ ZA should have done B would have done C may have done D must have done , c U; n& g3 i: y# J
should have + 动词过去分词,表示本应该做; may have + 动词过去分词,表示可能做过;
5 |$ z* p. K9 _) Q6 A" ]5 z% R6 L与过去事实相反的虚拟语气主句谓语动词的表达形式可能用到:would have + 动词过去分词。
6 y, q6 o0 E6 Q* E" ? ~. y' tmust have + 动词过去分词,表示对过去行为进行肯定推测。表示一定做过; & W$ y7 i5 ` Y& A1 W8 O
can’t have + 动词过去分词,表示对过去行为进行否定推测,表示不可能做过。 |