There are three separate sources of hazard (21) to the use of nuclear reaction to sup ply us with energy. Firstly, the radioactive material must travel from its place of manufac ture to the power station. (22) the power stations themselves are solidly built, the con tainer used for transport of the material are not. Unfortunately , there are (23) only two methods of transport available, namely, road or rail, and both of these (24) close con tact with the general public, (25) the routes are (26) to pass near, or even through, crowdedly populated areas.
Secondly, there is a problem of wastes. All nuclear power stations produce wastes which (27) will remain radioactive for thousands of years. It is (28) to de-active these wastes, and so they must be stored (29) one of the ingenious but cumbersome ways that scientists have invented. For example, they must be buried under the ground or sunk in the sea. However, these (30) do not solve the problem completely, they merely store it, since an earthquake could (31) open the containers like nuts.
Thirdly, there is the problem of accidental exposure (32) to a leak or an explosion at the power station. Compared with the other two hazards, this is not very likely and does not provide a serious (33) to the nuclear program, (34) it can happen, as the inhabitants of Har risburg will tell you.
Separately, and during short periods, these three types of risk are no great cause for concern. Taken together, though, and especially (35) much longer periods, the proba bility of a disaster is extremely high.

【正确答案】 A
【答案解析】[解析] “relate to”和“associate with”的意思均为“与……相关”，根据空格后面的to可知，正确答案为A。
【正确答案】 B
【答案解析】[解析] 根据后半句“the container used or trallsport of the material are not”可知，这里是一个转折。“However”也能表示转折，但此处应放在后半句，而“Although”应放在前半句。故正确答案为B。
【正确答案】 C
【答案解析】[解析] “typically”、“normally”和“commonly”三个单词都有“通常”的意思，但各自的偏重点分别在于“典型地”、“正常地”和“普遍地”。此处的意思应是“正常地”，即正常来说，只有两种输送的方法。故更合理的答案为C。
【正确答案】 B
【答案解析】[解析] “involve…with…”意为“与……相联系”，这里表示“公路和铁路都与公众有密切联系”，故正确答案为B。
【正确答案】 A
【答案解析】[解析] 空格后面的句意是前面提到的“公路和铁路都与公众有密切联系”的解释， 应选“since”，表示“因为”。故正确答案为A。
【正确答案】 A
【答案解析】[解析] “be bound to”意为“必然，不得不”，正确答案为A。
【正确答案】 A
【答案解析】[解析] 介词短语“in most cases”意为“在多数情况下，往往”，用在此处表示“废物往往几千年还保有放射性”。故正确答案为A。
【正确答案】 C
【答案解析】[解析] 根据后面的“they must be stored”可知，不可能消除这些废物的放射性。故正确答案为C。
【正确答案】 A
【答案解析】[解析] 根据句尾的“ways”可知，此处应使用介词“in”。故正确答案为A。
【正确答案】 B
【答案解析】[解析] 根据前文“one of the ingenious but cumbersome ways”可知，此处应用 “ways”。故正确答案为B。
【正确答案】 A
【答案解析】[解析] 固定搭配，“crack open”意为“啪的一声打开”。故正确答案为A。
单选题 A attached B. due
C. relevant D. owing
【正确答案】 D
【答案解析】[解析] 此处句意为“因泄漏或爆炸而造成的事故辐射”。四个选项中，“due to”和 “owing to”都有“由于，因为”的意思．但“due to”常用于口语中，故正确答案应为D。
【正确答案】 C
【答案解析】[解析] “disapproval”意为“不赞成”；“disagreement”意为“不和，不一致”； “protest”意为“异议，抗议”；“objection”意为“反对，障碍”。结合前面的“provide a serious”可知，合理的搭配应是选项C，即“提供严重的抗议”。故正确答案为C。
【正确答案】 A
【答案解析】[解析] 前后有转折之意，应用“but”。故正确答案为A。
【正确答案】 C
【答案解析】[解析] 固定搭配，“over long periods”．故正确答案为C。