我决定把这个班分成3组轮流给他们上课。（in turn）

填空题According to the passage, reduction in oil consumption is due to ________, a shift to other fuels and a decline in the importance of heavy, energy-intensive industries.

单项选择题According to the NAS’s report, one of the problems in end-of-life care is ________.

填空题It was in the 1950s that the American government finally took action to build a national highway system.

填空题wealth

问答题总是有人在寻找这样的机会，就算机会真的出现了，它也会很快消失掉。