1 . 根据句意内容，从方框中选出正确的选项，完成下列句子。答案的标号写在答题卡上。

A. concentrated     B. shallow     C. authority     D. energy     E. designed

1. The stream was quite ______ so we were able to walk across it.
2. Mexicans may use silence when instructions are given by a person in ______ instead of arguing with him or her.
3. We’ll use up all the coal underground. We have to develop new kinds of ______.
4. The course is specially ______ for beginners like you, focusing on listening and speaking.
5. Previous generations ______ on getting children to school on time, fed, dressed and ready to learn.