1 . With his attention ________ (concentrate) on the lecture, he didn’t pay any attention to his cellphone. (所给词的适当形式填空)

2 . Her worry makes it impossible for her to c___________ on her work.(根据首字母单词拼写)

3 . With so much noise going on, I can’t ________ (concentration) on my work. (所给词的适当形式填空)

4 . The driving instructor asked us to __________ (集中注意力) on the road when driving. (根据汉语提示单词拼写)

5 . I sometimes have trouble ________ (concentrate) on my task if there is much noise. (所给词的适当形式填空)

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 . I can’t c________ on my work. There is so much noise going on outside. （根据首字母单词拼写）