Man has______ways of showing his love to nature. He says he loves it, although he often______its beauty. While walking through the woods, how many times have we picked flowers, planted roots and all? Then later, as the______wither(枯萎), we throw them away. That’s one of the reasons ____many kinds of plants and flowers have become rare. Or have you______wondered where all the thousands of New Year trees come from and_____ happens to them once the______are over?

Man destroys nature by polluting the air. That’s probably the greatest danger_____our lives. The smoke from factories and______from cars and trucks do not harm only the surrounding vegetation(植被), it ____our health, too.Man pollutes rivers, seas and oceans. Just think of the______fish that die by the thousands because of polluted waters.

Biologists have______that all kinds of wild life are______in the areas where they live. Even the wolf, which we______dangerous and “bad”, plays an important role in nature. Here is an interesting example. There is a large______in one of the Great Lakes between Canada and the US. Early in this century many wild deer invaded(涌入) the island. Nobody knows how they______there.

The deer multiplied(繁殖) until there were as many as 40,000 on the island. They destroyed ____of the vegetation on it. Finally as they couldn’t find enough______they began to starve and die. Then came the wolf:_______knows how wolves got to the island, but they______. The wolves killed those deer that were easiest to catch—the sick, the weak and the old. So only the strong and the healthy animals were left. The island become green once again and there was enough food for the deer that were left.

NASA   scientists have found evidence of flowing water on Mars. This opens up the possibility of _______ and wonders we cannot begin to imagine. The _______ undoubtedly is an astonishing achievement.

We may be excited by the thought of living things on another _______, but we seem to have lost _______ in our own. In the past four decades, the world has_______ 50% of its vertebrate(脊椎动物)wildlife. But across the latter half of this period, there has been a steep _______ in media coverage of the subject.

Think of what would change if we valued _______ on the earth as much as we value the possibility of water on Mars. _______3% of the water on this planet is fresh and of that, two-thirds is frozen. Yet we lay waste to the _______ part. Sixty per-cent of the water used in farming is ________ by careless irrigation. Rivers, lakes and aquifers (地下蓄水层)are sucked dry, while what remains is often so bad that it ________ the lives of those who drink it. As for salty water, which so interests us ________apparently detected on Mars, on Earth we express our ________ by destroying it. A new report suggests fish numbers have halved since 1970. Coral reefs are under such ________ that most could be gone by 2050.

A couple of weeks ago, I launched a column(专栏) focusing on extreme consumption, and ________ suggestions. They have flooded in. here are just a few of the ________. Wigs(假发)for babies, to allow “baby girls” with little or no __________ at all the opportunity to have a beautifully realistic hair style”. The iPotty, which ________ little children to keep playing while toilet training. A smartphone for dogs to take pictures of themselves…

As clever new ways of wasting stuff are continually ________, we become more used to the ________ consumption of the world’s precious resources. Isn’t it time for us to have seconds thoughts about our lifestyle?

One evening, Catherine was at home as usual. As her____swung between what she was going to do with her life and their dinner plans for the evening, she was unexpectedly ___by an urgent call from her sister “Get over here! Turn on NBC and check these guys out. They are just like you…” One Facebook message and a phone interview later, Catherine____herself on a bus with 8 strangers in the middle of the sweltering desert heat of Utah, picking up trash and ___awareness about zero-waste and climate change.

With a deep____of the environment and a desire to make a __ , Catherine, Davey, and a group of self ___“environmental pick-up artists” went on a coast to coast road side trash pick-up. As they walked, sometimes only______0.9 miles in an entire day, they ____ and steadily made their way across the United States for three years, picking up a total of 201,678 pounds of trash.

Catherine and Davey____with us wonderful stories of hope and inspiration that fueled their___to continue their journey. After spending weeks silently______how she would have enough _____to fly home for their two-week spring break, Catherine found a blank, unidentified envelope____with $850 cash in the desert. Just enough to get her home and back. After their bus____outside of Denver, they unexpectedly got ____ and arrived in Yosemite National Park three weeks later, just in time for the “Yosemite Facelift” where____ from all over the state came together with a______of cleaning up trash all over the park.

Being at the right place at the right time became almost normal, and they realized that much of what they ____was more than just a coincidence. Together, their team learned to simply ____themselves to their task, and surrender to the journey.