1 . They’re tough breeds and they have complicated names to match. But free-spirited Aussie dogs Tank the Rottweiler-cross and Muck the Staffie-cross instinctively (本能地) knew when a small child was in danger, and their protective _______ prevented a tragedy.

One December afternoon, Georgie Hillier thought her two-year-old son Max was playing in the back garden of their home. But when she went to check, there was no _______ of Max or their dog Tank. When she couldn’t find them, she jumped in her car and started to _______ the neighboring property. She was frightened that her son could have fallen into one of the dams.

Then she found Tank with the neighbor’s dog Muck. They were both running around the dams, barking furiously and _______ in mud.

“I just panicked. I was running around, checking the sides of the dams,“ Georgie told Sara Hicks. _______ she kept searching, a neighbor called the police. Eventually, a woman who had found Max heard Georgie’s calls and brought the _______ kid out to her.

There was no one there to _______ what exactly happened, but Michael Beattie from the Royal Society for the Prevention of Cruelty to Animals took up the story. “When the police arrived on the _______, they saw quite distinct drag marks. It was _______ that young Max had actually been pulled out of the dam by one of the dogs - most likely Tank. Max was making moves to go back into the dam and Muck was virtually heading him off at the pass. It was the police’s opinion that the only way that Max was ____________ from drowning was by the two dogs. ”

For saving the toddler’s life, the daring two dogs received the RSPCA’s Purple Cross award for bravery- plus two very large bones.

2 . Production of bottled water has grown over the past thirty years from nothing into a $16 billion-per-year business. However, more and more people have been against bottled water use, and environmentalists are _______ people to go back to the tap.

The first reason why you should seriously think about _______ bottled water, they say, is that it’s bad for the environment. Producing plastic bottles _______ vast quantities of oil. As a result, factories create poisonous waste and send it into the environment. What is more, the vast majority of plastic water bottles aren’t _______. In almost every part of the world, unwanted water bottles take up landfills (垃圾填埋地) and send dangerous gases into air and water when they are burned. In other words, bottled water is a major _______ to global warming.

Secondly, the _______ of bottled water requires a lot of fuel. In the USA alone, one billion bottles of water are moved around each week in trucks, giving off polluting gases. In fact, some high-priced water is _______ from one side of the planet to the other.

Finally, bottled water isn’t even better for your health. Tap water rules in many countries are far _______ than those for bottled water. Furthermore, tap water contains fluoride, which is added to help build strong teeth and prevent tooth decay (龋齿). Consequently, as the use of bottled water has _______, tooth decay has become more serious.

To sum up, by stopping the use of bottled water, and encouraging others to do so, you will be doing the planet an enormous favor and ________ your own health as well.