【推荐1】这些20世纪的先驱都致力于提高人类生活质量。
These pioneers of the 20th century ________the quality of human life.

【推荐2】我们应当采取适当的措施提高教学质量。（take measures to）
We should ________________________________.

【推荐2】你可以相信,你有困难时我会帮助你。（一句多译）
（1） You can rely on me ________ (help) you when you are in trouble.
（2）You can rely ________ it that I can help you when you are in trouble.
（3）You can rely on my ________ (help) you when you are in trouble.

【推荐1】问题是我们怎样能弄到我们需要的东西。
The problem is ________ ________ ________ ________ the things we need.

【推荐2】她们用古老的方法创造优雅的当代艺术品。
They ________ ancient methods ________ ________ __________ and __________ works of art.

【推荐1】我们的地球已经遭到严重污染了，因此是时候采取措施来改变这种糟糕的状况了。
Since our earth has been polluted terribly,   __________ __________ __________ that we took action to change the bad condition.

【推荐3】我觉得我有义务要坦白地对你说。（duty）
I feel ________________________ frankly to you.