1 . A b________ diet provides nutrition for your body. (根据首字母单词拼写)

2 . She was b________________ from athletics for two years after failing a drug test. (根据首字母单词拼写)

3 . After many years’ development, the bank has ________(分支) all over the country. (根据汉语提示单词拼写)

4 . Many different ecosystems give this area the richest b_____________ on the Earth: one in ten known species in the world can be found here.(根据首字母单词拼写)

5 . At the bottom, there is a system of roots b________________ the ground. （根据首字母单词拼写）

6 . Spending a year working in the city helped to b________ his horizons. (to increase your experience, knowledge) （根据首字母和英文释义单词拼写）

8 . Her income was ________________ (only, merely) enough to maintain one child, let alone three. （根据英文释义单词拼写）

9 . Jim struggled to his feet, took a step forward carefully but soon he lost his _________________ (平衡). (根据汉语提示单词拼写)

10 . The ______________ (基础) of friendship needs care and trust. (根据汉语提示单词拼写)