Plastic bags are useful for holding many kinds of food, _______ their cleanness, toughness and low cost. But they are harmful to environment.

A.by virtue of B.in addition to C.for the sake of D.as opposed to

我们必须以极大的热情坚持不懈地工作，去跨越科学进步与我们道德进步之间的鸿沟。人类最大的问题之一是我们蒙受精神上的贫困，它与我们科学技术方面的富有形成鲜明的对照。我们在物质上越富有，在道德和精神上就越贫困。每个人都生活在两个世界之中，内心世界和外部世界。内心世界是用艺术、文学、道德和宗教表达的精神目标的世界。外部世界是我们赖以生存的装置、技术、机械和手段的综合。我们今天的问题是我们允许内心世界丧失于外部世界之中。我们允许赖以生存的手段超越生活的目标。这是现代人类面临的严重困境及萦绕心头的重要问题。

A month has ______ and there is no sign of the situation getting any better.

West Lake boasts a fine landscape making tourists ______ of the picture of a fairy tale.

The documents were not ready; ______ we couldn’t sing them.

That part of the city has long been ______ for its street violence.