4．The film produced by Zhang Yimou is_well_worth_seeing.

　　张艺谋拍摄的那部电影很值得看。

　　5．I recommend him without_reservation，as I believe you will appreciate his ability in his studies.

　　 我毫无保留地向你推荐他，因为我相信，你会赏识他的研究能力。

　　Ⅳ.阅读理解

　　A

　　The sun rises above the Arctic Ocean(北冰洋). Across the frozen sea, a white bear moves slowly.

　　The bear stops and sways (摇晃) his head from side to side. There is nothing to see but endless ice and red sky. Then his powerful nose senses what his eyes cannot: a beluga whale is nearby.

　　The bear follows the smell and spots a large hole in the ice where a small white whale is swimming. He silently walks toward the hole, then stops, standing still. The whale does not see the bear, whose white fur makes him appear invisible against the ice.

　　Finally, the whale swims close to where the bear is waiting. With terrifying speed, the bear comes to life and moves toward the whale. In a moment it is over, and the bear eats his first meal in nearly a week.

　　Polar bears rule the frozen sea, but their ancestors (祖先) weren't always built for ice and snow. The first Arctic bears were brown bears, a species that includes grizzly bears. They came to the icy north over a hundred thousand years ago.

　　No one knows for sure why these bears traveled to such a cold place. Scientists think they might have wandered north looking for food. Maybe they became trapped by glaciers (冰川) and couldn't leave. Whatever the reason, the bears never should have survived.

　　But they did. They got used to their new environment. Their bodies changed. Their behavior changed, too. Eventually, the bears developed into an entirely new species: the polar bear. You can see some of the characteristics that polar bears developed to survive.

　　Sadly, these characteristics may now threaten the polar bear's survival. As sea ice melts due to global warming, polar bears are frequently forced to come ashore. They are poor hunters on land, which means they often go a long time between meals. The polar bear, king of the Arctic, is now classified as a threatened species.

　　Although the future of the polar bear is unknown, the tale of two bears continues. As temperatures rise, grizzly bears have been spotted moving north into polar bear territory (领地). These long­lost cousins, once forced apart by nature, are coming back together again.

　　语篇解读：本文是说明文。北极熊的祖先为适应环境而不断改变自身特征，而现在这些特征却让北极熊陷入困境。

1．What can be inferred about the white bear mentioned in the first four paragraphs?