1 . I had ________in my stomach (紧张), since it would soon be my turn to make a speech. （用适当的词填空）

2 . When we add huge ________(数量) of extra carbon dioxide into the atmosphere, the global temperature tends to go up.（根据汉语提示单词拼写）

3 . The number of people infected with HIV may reach 50 million by 2030 unless________(有效的) measures are taken to prevent the spread of the disease.(根据汉语提示单词拼写)

4 . It’s bad m________ to talk with your finger pointing at the other person. （根据首字母单词拼写）

5 . Reading is the f________ skill on which school education depends, so we have to attach great importance to it. (根据首字母单词拼写)

6 . Diets are the most effective when ________(结合) with exercise. （根据汉语提示单词拼写）

7 . It is o________ that students are looking forward to the arrival of summer holiday. （根据首字母单词拼写）

8 . The _______ (氛围) of the picnic is very friendly. Children are having fun with each other.