1 . The guy next to me talked to me the whole time. I couldn’t concentrate ________ the experiment.（用适当的词填空）

2 . With his attention________（集中）on his book, he didn't even look up when we came in.（根据汉语提示单词拼写）

3 . They________ (集中) all their attention on finding a solution to the problem.(根据汉语提示单词拼写)

4 . C________ on their studies is not easy for children aged only 10 because they are curious about everything around them.（根据首字母单词拼写）

5 . Having failed my French exams，I decided to c__________ on science subjects．

6 . Be thankful for what you have; you’ll end up having more. If you ______ (专注) on what you don’t have, you will never have enough.

7 . Tony c_________ on his lessons, completely ignoring what was happening outside.

8 . When you exercise, your body produces some chemicals that make you feel peaceful and relaxed and increase your ability to c________ when you study. （根据首字母拼写）

9 . She always c_____on her studies in class, so she does well in exams. （根据首字母单词拼写）

10 . You should c_____________ on your work when you study. （根据首字母填空）