You should not feel guilty for not helping him; ______you have helped him many times in the past.

My View on Energy Crisis

    Silver miners first discovered Mexico’s surreal Cave of Crystals almost a decade ago. The BBC recently took a rare tour of the underground cavern that contains the world’s largest naturally grown crystals, where some selenite structures reach almost 33 feet in length.

     See those little dots climbing the crystals that look like ants? Those are people.

     Casual spclankers can’t enter the cave without risking their lives, unless they have the right breathing mask and cooling suit. Stifling temperatures of 122 degrees F combined with almost 100 percent humidity posed a deadly challenge for early explorers. Such conditions mean that every breath can lead to fluid condensing inside the lungs, which represents a less-than-ideal scenario for continued breathing.

    But the cave’s wonders prove alluring once you get past the dangers. The BBC’s new scries “How the Earth Made Us” accompanies Iain Stewart, a geologist at the University of Plymouth in the UK, on a trip into the Naica silver mine.

   Take a good look at the footage below, because the Cave of Crystals is destined to disappear once the mine owners decide to end operations and pull out their pumps. Then the mines and cave alike will flood once more.

Life is a continuous flow of experience; each act or moment of time is preceded by a previous experience and becomes the threshold for the experience to come. If we acknowledge chat an objective of life is the achievement of a continuous flow of harmonious experiences, then the relationship of spaces to one another, as experienced over time, becomes a major design problem. When viewed in this way, architecture takes its place with the aits of poetry and music, in which no single part can be considered except in relation to what immediately precedes or follows it.

reinforce

untangle

gigantic

given

typify

1、鲸鱼是海洋中一种巨大的哺乳动物。

2、假如有机会，我会整天都看书。

3、汤姆，你整理电线在行吗?

4、他的行为只能让我更讨厌他。

5、他最新的书反映了中国的传统思想，这也代表了他大部分作品的特点。

used    communication      together         especially       leaves           years           opportunities       average      realized      devoted

     Perhaps more imprtant than the lack of family outings is the destruction of family time(31)at home. Social scientists in the 1950s could not have (32) how much television would watch in the 1980s; the (33) American watches 6 hours of TV a day. That (34) little time for the special family characteristics and traditions that(35)to be formed during long evenings together. The time (36) to games, songs, and hobbies—all shared activities—in the(37)before TV is now dominated by the “tube”. And (38) damaging to family relationships is the elimination of the(39)for talking, chatting, arguing, discussing. Without such (40), family life disintegrates.

The trees______in spring.

They’ve been sponswing the World Cup______over a million and a half pounds.

The chef is_______vegetarian diets.

Please_______this collection of money for homeless families.

A writer has to______his imagination and experience.