在下面一段话的空缺处依次填入词语，最恰当的一组是（）
独自坐在火炉旁边，静静地凝视面前       的火焰，细听炉里呼呼的声音，心中是不专注在任何事物上面的，只是痴痴地望着炉火，说是怀一种惘怅的情绪，    ，可以说是感到了所有的希望全已幻灭，因而反现出            的心境，亦无不可。

    It's Sunday. Children don't go to school on Sundays. But Kate gets up early in the morning. “It's my birthday. I'm eight years old today.” she thinks, “Where are Dad and Mum? I want to know what they can give me for my birthday.”

    Her father and mother are not at home. They are going shopping. And now they are talking about what to buy for Kate.

—Dad: How about the doll? It looks nice. I think Kate would like the doll.

—Mom: I don't think so. She is not a little girl. I think she likes a new dress. Girls often like new dresses very much.

—Dad: But she has a few new dresses and some new blouses. Oh, I think she must be very happy to have a box of colorful pencils and some picture books. Do you think so?

— Mom: Yes. Let's go over there and buy them.

使用图中所示的U形管压强计时，先要使U形管两管中液面的____ 为零，图(b)、(c)为实验中的一个情景，此时探究的是液体内部压强与液体的____ 的关系。若利用图(a)、(b)来探究液体内部压强与深度的关系，则应在图(a)容器中倒入____ (选填“水”、“酒精”或“盐水”)，并将橡皮膜置于液体中的深度与图(b)中的h____ (选填“相等”或“不相等”)。

    Colorado officials will stick to a plan to kill some mountain lions and bears to support the state's dropping mule deer (长耳鹿) population.

    Wednesday's vote permits organizations to kill up to 25 black bears and 15 mountain lions per year in the central and western parts of the state. The project will run for three years, to be followed by a six-year study of how deer populations respond to fewer predators(捕食者).

    The population of Colorado's mule deer has suffered a puzzling, years-long drop to about 450,000, which state officials said was about 110,000 fewer than there should be. A 2014 state study tied it to seven causes, including predators, whose number has greatly increased in recent years.

    Some experts, however, said the state should focus first on the human-led destruction(破坏) of mule deer habitat(栖息地). “The drop of the mule deer population is obviously not a simple problem with simple causes,” Brian Kurzel, director of the National Wildlife Federation, said. “By far, the greatest problem—the one that I think deserves the most attention in any science-based study—is habitat quantity and quality.”

    Kurzel pointed out that the U.S Bureau of Land Management recently agreed to create 15,000 new oil and gas wells somewhere in western Cororado, which was often called “the mule-deer factory”. There, the number of mule deer has fallen to about 30,000 from more than 100,000 in the early 1980s. Though state officials have known oil and gas development affects the population of mule deer, they didn't go against the plan.

    Other causes like building highways, population growth and human activities are also curbing the mule deer population, according to the study.

    State Parks and Wildlife officials don't necessarily disagree. They started a $4.5 million program as a way to gather research for later decisions.