大学英语四级改错练习题及答案七

会计考友

Word came from California of a new weapon in the war on household pests．
5 ?- P+ U+ c: LTwo scientists work for a firm in California developed 1．__________  
a new method to eliminate insects with using dangerous chemicals．2．__________  
+ N+ F( `. {7 sThe new weapon—hot air．The basic idea is that
  H" m3 x, E* }2 ~: r8 T$ f: k/ _6 ^6 Xinsect pests can adjust to temperature much above normal．3．__________  
In laboratory experiments，cockroaches and termites can’t survive
much more than a quarter of hour at 100 degrees 4．__________  
% t" s: G& E9 E/ |Fahrenheit or about fifty degrees centigrade． The new method involves
covering a house with a huge tent，and fill it with air heated to 5．__________
around 65 degrees centigrade．
+ }  G5 f* I( OHot air is forced in with fans and the tent keeps the heat inside the house．
Although termites try to escape by hiding in wood beams，6．__________
the heat treatment must be continued by four to six hours． 7．__________
7 ^' F# N4 A, |. M! k1 c9 NBut when it's all over and the insects are dead，
% d; \- C6 e! g3 d* E* K0 E! lthere are no toxic residues to danger humans or pets，and no 8．__________
% k' f/ f% d6 h& e  z! c, M( S" tfunny smells．Scientists claim that there's no danger of fire too．9．_________
Since very few household, materials will burn at 65 degrees centigrade. In fact, wood is prepared for construction use by drying
in the ovens at 100 degrees centigrade, that is substantially hotter. 10._________
; l- }, W% G# T) T 参考答案：
' p* G9 z4 l& T$ N: Q& t; \& [1. work → working
( G0 |9 c# E! Y7 D2. with → without
3. can adjust → can not adjust
4. hour → an hour
5. fill → filling
6. Although → Since
7. by → for
0 L9 ?  q5 X, V- r/ v) v/ r1 f8. danger → endanger
9. too → either
( n- T& z8 _% a" P" v$ y2 i10. that → which