1 . After climbing to the top of the mountain, I found it difficult to_____(呼吸).

2 . Many people have come to realize that they should go on a ________ (balance) diet. （所给词的适当形式填空）

3 . The use of paper bags is of great b________ to the environment. （根据首字母单词拼写）

4 . The air was so thin that we could hardly b________.（根据首字母单词拼写）

5 . — Who does this scarf b______ (属于) to?
— Mary. (根据中英文提示单词拼写)

6 . Humans take in oxygen(氧气) and________(呼吸)out carbon dioxide(二氧化碳). （根据汉语提示单词拼写）

7 . _________(base) an important decision more on emotion than on reason, you will regret it sooner or later. (所给词的适当形式填空)

8 . It is reported that a space station_________________(build) on the moon in years to come.

9 . It is my b____________(信念) that we will succeed one day.

10 . We can b_____________(受益) from reading books.