1 . She told me she had trouble c______ (全神贯注) in class. (根据中英文提示单词拼写)

2 . 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）

3 . She has made such rapid progress with all her efforts c________ (集中) on her work. (根据中英文提示填空)

4 . All that noise makes it hard to c______(集中注意力). (根据中英文提示单词拼写)

5 . The medicine always made him feel sleepy and unable to c________(集中注意力).(根据中英文提示填空)

6 . The lecture will recommend several effective approaches to c___________ (集中) your attention. (根据中英文提示单词拼写)

7 . Her friend Laura Williams told me she had trouble c________ (集中，全神贯注于) on what the teachers said in class. (根据中英文提示填空)

8 . It was up to him to c________ (集中注意力) on his studies and make something of himself. （根据中英文提示填空）

9 . Once you c_____________(集中注意力) on your listening in class, you’ll easily understand what the teachers mean.

10 . I couldn’t c_________ (专注) on the experiment because the guy next to me tried to talk to me the whole time.(根据中英文提示单词拼写)