问题补充:
If you have any difficulty with this paper, you can your notebooks.
A. focus on
B. carry on
C. refer to
D. go with
答案:
A. focus on
B. carry on
(答案→)C. refer to
D. go with
解析:考查词组:A. focus on专注于B. carry on继续C. refer to参考,查阅D. go with和…匹配,句意:如果你写试卷有困难,可以参考笔记。选C。