1 . In order to enlarge my vocabulary, I make ________ a rule to take notes. (用适当的词填空)

2 . Coach Miller makes __________ a rule that all players must wear their team shirts during practice. (用适当的词填空)

3 . The pouring rain that night made it hard for witnesses ____________ (identify) the murderer. (所给词的适当形式填空)

4 . I found ______ useless trying to talk him out of buying the expensive toy. (用适当的词填空)

5 . The damaged roads made _______ difficult to deliver food and supplies to those in need. (用适当的词填空)

6 . The research reveals that teenagers find ________ difficult to concentrate on their study after playing mobile games continuously for an hour. (用适当的词填空)

7 . ________ shocked us that as many as 100 species of fish, some unique to these waters, may have been affected by the pollution. (用适当的词填空)

8 . I feel ________ our responsibility to protect and pass on our outstanding traditional culture. (用适当的词填空)

9 . I would appreciate ________ if you could let me know in advance whether you will come or not. (用适当的词填空)

10 . All young footballers have the dream of making ________ to the top. (用适当的词填空)