both
either
every
all
第1题：
The use of high-tech products may produce some unexpected side (英译汉)effects.
第2题：
A. either
B. every
C. both
D. neither
第3题：
A. than the police arrived
B. when the police arrived
C. as the police arrived
D. than police arrived
第4题：
第5题：
The offspring of the supertrees have proved to be genetically superior to those of the average trees.
第6题：
The street is()for five cars to go side by side.
A. wide
B. wide enough
C. enough wide
第7题：
Which of the following usually causes a tree to grow unhealthy?
A. Giving a tree a special shape and a definite height.
B. Removing small side branches and making a tree look less thick.
C. Allowing too many branches to grow in the middle.
D. Having a tree surrounded by many other trees.
42．答案为C 根据第二段A tree may grow healthier by removing the branches that are locking up the centre可知树中间的枝杈不利于树木生长，C与文章内容相反，因此错误。
第8题：
From the last paragraph we can learn that __
A. some pipes have to be re-arranged in winter
B. the system can do more than warming up the building
C. the exchangers will pick up heat from the street surface
D. less heat may be collected in winter than in summer
第9题：
What is the function of wearing rings found on some centrifugal pumps ________．
A.Absorb erosion of high velocity discharge stream
B.Seal pump shaft against entry of air
C.Isolate the outlet side from the inlet side
D.Dampen the turbulent discharge flow
第10题：