1 . Students should ______(集中)on their own and improve themselves.(根据汉语提示单词拼写)

2 . ________ (专注，专心) yourself on some positive and relaxing things. (根据汉语提示单词拼写)

3 . She has not eaten breakfast for the last few months and she has had trouble c______ in class. (根据首字母单词拼写)

4 . _________ (专心于) on my homework, I didn’t notice they had sat down behind me. (根据汉语提示单词拼写)

5 . He found it hard to c_____________ (集中精力) on his homework with his parents quarreling loudly. （根据中英文提示拼写单词）

6 . You should ______(专注于，集中注意力于) on what you want to do in your daily life. (根据汉语提示单词拼写)

7 . I was unable to c______ on my studies with the noise going on outside. (根据首字母单词拼写)

8 . Don’t worry. I will __________all my efforts on finding your possessions.   (专注)(根据汉语提示单词拼写)

9 . John _________ on his studies though there were much noise outside. (根据句意填空)

10 . The medicine always made him feel dopey (昏昏欲睡的) and unable to _______(专注). (根据汉语提示单词拼写)