A

I have the【小题1】(great)job in the world. I travel to unusual places and work alongside people from all over the world. Sometimes using【小题2】(science)equipment and sometimes meeting local people and tourists, I am never【小题3】(bore).Although my job is occasionally dangerous, I don’t mind because danger excites me and makes me feel alive. However, the most important thing about my job is that I help protect ordinary people【小题4】 one of the most powerful forces on earth—the volcano.

B

Water is a precious resource. Every person needs it【小题5】 (survive),and we use it for cooking, drinking, growing our food and washing. However，it is scarce(缺乏的).Just 1% of water on Earth can【小题6】 (use)by humans. What’s more，treating water to make it clean and safe and pumping it to our homes uses up lots of energy. So, what can you do to help save water? One easy way is by【小题7】(turn)off the tap when you brush your teeth.

C

Robbie Phillips has become the first British person to complete one of the toughest challenges in rock climbing. 【小题8】(know)as the Alpine Trilogy(阿尔卑斯三部曲),the challenge consists of three climbs on mountains in Austria, Germany and Switzerland, 【小题9】Phillips completed in four years. Until now, only four other people【小题10】(conquer)all three of the extremely difficult climbs.

Cats are second only to dogs as the most common pets in the world. 【小题1】 (compare) with dogs, cats might seem cold, but they can form strong emotional bonds with their owners. Studies have shown that cat-owning seniors often exhibit lower levels of 【小题2】 (lonely), anxiety, and depression. 【小题3】 (own) a cat invites several costs, for food, litter, medications, toys and care. However, cats do not need regular bathing 【小题4】 they have health problems that make it necessary.

If you go out to the fields at night in spring or summer, you can hear frogs singing here and there. It seems as if they were 【小题1】 (perform) a field symphony (交响).

The frog is a good and useful creature 【小题2】 benefits human beings. They can catch fast- moving insects. Each frog eats a large number of pests (害虫) that are 【小题3】 (harm) to crops. This little creature 【小题4】 (be) regarded as “the natural enemy of pests”. 【小题5】 now frogs are getting fewer and fewer. This is because they are killed and put on the table as a delicious dish by 【小题6】 (they) chief enemy, human beings. It is a shameless and cruel act, isn’t it?

The cause that is responsible for the rapid reduction of frogs is that 【小题7】 (farmer) use insecticide (杀虫剂) to kill pests. And frogs get killed as a result of 【小题8】 (eat) poison-killed insects.

Something must be done as soon as possible 【小题9】 (save) frogs. If we don’t punish those who sell and kill frogs to make money, then one day all of us 【小题10】 (punish) by nature for failing to keep them.