1 . Motivated by the Olympic motto “Faster, Higher, Stronger”, many well-known athletes, both male and female, have devoted themselves to achieving sporting excellence and pushing the b__________ of human achievement. (根据首字母单词拼写)

2 . There is no b__________ in the development of science, and new discoveries are being made without an end.

3 . He will demonstrate how country ________ (boundary) are drawn on this map with dotted lines. （所给词的适当形式填空）

4 . As is known to all, the b______ between Shanxi and Shaanxi is the Huanghe River.(根据首字母单词拼写)

5 . Within many theme park ________ (boundary), there are a wide variety of activities, appealing to both children and adults. （所给词的适当形式填空）

6 . With the advance in science, the ______ (界限) of human knowledge are being pushed future. (根据汉语意思单词拼写)

7 . Though the Sami are allowed to continue their traditional way of life in the park, no one else can live here, and all new development is banned within park boundaries. (英译汉)

8 . Some scientists are making their attempts to push the b________of human achievement.

9 . Some scientists are making their attempts to push the b________ of human achievement. (根据首字母单词拼写）

10 . Anything that crosses the _____ (边界) of a black hole cannot get back.