[单项选择]One solution to major security problems is （），which are frequently installed to fix known security holes.
A. patches
B. compensations
C. complements
D. additions

[单项选择]One solution to major security problems is (71) , which are frequently installed to fix known security holes。
A. additions
B. compensations
C. patches
D. complements

[单项选择]One solution to major security problems is ______, which are frequently installed to fix known security holes.
A. patches
B. compensations
C. complements
D. additions

[单项选择]One solution to major security problem is______，which are frequently installed to fix known security holes.
A. patches
B. compensations
C. complements
D. additions

[单项选择]One of the major problems most small businesses encounter today is ______ advertising is often costly and often takes some time to begin working.
A. because
B. that
C. What
D. how

[单项选择]

Text 1
One of the major problems of nuclear energy is the inability of scientists to discover a safe way to dispose of the radioactive wastes which occur throughout the nuclear process. Many of these wastes remain dangerously active for tens of thousands of years, while others have a life span closer to a quarter of a million years. Various methods have been used to date, but all have revealed weaknesses, forcing scientists to continue their search.
The nuclear process involves several stages, with the danger of radioactivity constantly present. Fuel for nuclear reactors comes from uranium ore, which, when mined,, spontaneously produces radioactive substances as byproducts. This characteristic of uranium ore went undetected for a long time resulting in the death, due to cancer, of hundreds of uranium miners.
The United States attempted to bury much of its radioactive waste material in containers made of steel covered in concrete and capable of holdi
A. it produces radioactive substances after it is dug out
B. it has caused deaths of many miners
C. the mining of it produces dangerous by-products
D. there is a problem in mining techniques

[单项选择]As an English major student at one of the most famous universities in China, I strongly believe that business English is more practical than other fields.（　）
A. a student in English
B. a major English student
C. an English major
D. an English student major

[单项选择]Strickland pointed out one major advantage of talking binoculars that ______.


A. it is impossible for the enemy to detect them
B. the chance of being detected by the enemy is slim
C. the laser beam they send is too weak to be detected
D. they can only be detected if the detector is near to the forward scout

[单项选择]The passage suggests that one major difficulty in establishing patterns of migration is
A. (A) the infrequency of life course events, which restricts the amount of data available to demographers
B. (B) the overwhelming availability of proxies in migration patterns, which creates a degree of stasis in migration records
C. (C) the lack of parishioner birth records, which limits the hard evidence upon which demographers base their observations
D. (D) the homogeneity of single parishes, which makes it difficult to distinguish the motivations of migrants
E. (E) the repetitive nature of migration, which results in a surfeit of unusable data that overwhelms demographers

[单项选择]One of the problems the local authorities have to deal with is the ______ of plastic containers


A. disposal
B. dispatch
C. discourse
D. dismay