It is over 40 years since first atomic bomb was dropped on a major city in Japan. Yet even now its effects are showing themselves and may continue to do so for years to come. Much effort and human energy have been used to try to prevent such a terrifying thing from happening again. So far there is no guarantee that it will not. Countries which already possess nuclear knowledge and resources have bombs stored away which are powerful enough to wipe out all life on earth. But this is not all. Other countries, which previously were not so advanced in technology, are gradually buying materials that can be used for making atomic devices. This nuclear energy will naturally be of great value in helping the economy of poorer nations.

The generation of electricity through nuclear power came directly from the original work on the atom bomb. Because of the increase in demand for energy and the possibility of decreasing supplies of oil and natural gas, the interest in electricity has increased. One of the by-products of nuclear power stations is plutonium (钸) produced from unclear fuel: plutonium is ingredient (成分) in bomb-making. It means that there are far more opportunities for the manufacture of bombs.

This brings the problem to a full circle again. How can something so valuable and useful be controlled so that it works for the benefit and not the destruction of man?

9. The effects of dropping the first atomic bomb ________.

A. are not over                      B. may go on forever    

C. could last much longer             D. will not be over in the near future

10. The writer says that enough atomic bombs have already been manufactured to ________.

A. wipe out Japan                    B. last forever    

C. act as a peace-keeping device       D. destroy all living things

11. The advantage of less developed countries being able to make atomic devices is that it ______.

A. gives them more opportunities for work     B. will help poor countries to become richer

C. will enable them to make better explosives    D. will be of great value to them

12. The second paragraph tells us that the increased demand for electricity today ________.

A. has led to the decrease in supplies of oil

B. means that more countries are interested in nuclear power

C. has increased the risk of accidental explosions

D. has increased the very means of producing more atomic bombs

Will _____ to start work tomorrow?

   A. it be convenient of you         B. it be convenient for you

   C. you be convenient               D. you be of convenience

_________ to the efforts by the headmaster, I can go back to school now.

More parents are looking to cellphones to help keep their children safe.  But mom and dad should be careful: Kids who talk on a cellphone may be more likely to step into traffic. Children should learn to end phone conversations before they prepare to step into traffic.

     While research shows that older kids and more experienced users also don’t navigate(穿行于) streets as well while on a cellphone, younger children tends to find the small tools more distracting(令人分心的).

“Kids of this age are just learning to cross the street on their own, ”says David-Schwebel, a co-author of the study. “They’re beginners. ”

     Kids don’t need to be stopped from chatting on the phone when outside,

however. Instead, parents simply should instruct them to finish their conversations before crossing the street.        

“I don’t think this means parents should take phones away from their kids, ”says Schwebel. “I encourage families to get cellphones for their children.  They’re more helpful than harmful,  if they’re used in a safe way. ”

     Other distractions, such as conversations with friends, listening to music,  and text messaging, may also cause problems for children in this age group.  The researchers expect to study the effect of those types of distractions in the future.

Experts in child safety approved the cellphone study. “If you’re talking on a cellphone,  you’re not paying much attention to the environment around you, ” says Susan Baker, a professor.

     Brooke Carlson, a 44-year-old mom, has noticed how riveted her 9-year-old son is when he’s talking on the cellphone. Although she’d never thought of the dangers of crossing traffic while on the phone, Carlson says, “Now that I know about it, it makes total sense. ”She plans to have a chat with her child about cellphones and street safety.

For younger kids, parents might consider purchasing a phone with a plan that only allows the child to call up his or her parents. That way the cellphone can be used for emergencies, but not for chatting with friends for hours.

In Schwebel’s opinion, _____ .

A. kids are still too young to walk on the street alone

B. kids don’t know how to use cellphones appropriately

C. kids have little experience in crossing the street alone

D. kids are not experienced cellphone users

Which of the following is Schwebel in favor of?

A. Children shouldn’t be allowed to have a cellphone.

B. Children should be forbidden to chat on the phone when outside.

C. Cellphones do more harm to children than other distractions.

D. Parents should teach kids about cellphones and street safety.

The underlined word “riveted” may mean“_____”.

A. confused              B. absorbed

C. dangerous             D. excited

According to the passage, what does Mrs Carlson know?

A. There are dangers of crossing streets while on the phone.

B. Her 9-year-old son is not interested in talking on the phone.

C. Cellphones are more helpful than harmful to children.

D. Kids don’t pay attention to the environment when talking on the phone.

The purpose of writing this passage is to _____.

A. advise parents not to buy cellphones for children

B. introduce a phone that only allows kids to call up parents

C. expect kids not to talk on cellphones while on the street

D. expect people to use cellphones less in daily life

What time is it? Most people are pretty accurate in their answer. And if you don’t know for sure, it’s a very likely that you can find out. There may be a watch on your wrist, there may be a clock on the wall, desk, or computer screen; or maybe you’re riding in a car that has a clock in the dashboard (仪表板).

Even if you don’t have a timepiece of some sort nearby, your body keeps its own beat. Humans have an internal clock that regulates (调节) the beating of our heart, the pace of our breathing, the discharge (排出) of chemicals within our bloodstream, and many other bodily functions.

Time is something from which we can’t escape. Even if we ignore it, it’s still going by, ticking away, second by second, minute by minute, hour by hour. So the main issue in using your time well is, “Who’s in charge?” We can allow time to slip by and let it be our enemy. Or we can take control of it and make it our ally.

By taking control of how you spend your time, you’ll increase your chances of becoming a more successful student. Perhaps more importantly, the better you are at managing the time you devote to your studies, the more time you’ll have to spend on your outside interests.

The aim of time management is not to schedule every moment so we become slaves of a timetable that governs every waking moment of the day. Instead, the aim is to make informed choices as to how we use our time. Rather than letting the day go by, largely without our awareness, what we are going to discuss next can make us better able to control time for our own purposes.

56. The underlined word “ally” in Para. 3 more likely means somebody or something that is _________.

   A. your slave and serves you            

B. your supporter and helps you

   C. under your control and obeys you 

D. under your influence and follows you

57. The author intends to tell us that time _____________.

   A. could be regulated by a timepiece such as a clock or a watch

   B. could be managed by the internal clock of human bodies

   C. should be well managed for our own interest

   D. should be saved for outside interests

58. In the next part, the author would most probably discuss with you ________.

   A. how to keep up with the times       B. how to make up for lost time

   C. how to have a good time           D. how to make good use of time