To read newspapers before going to bed seemed to be a rule _____.
30. It is the test system, rather than the teachers,______is to blame for the students’ heavy burden nowadays.
29. The moment we heard of the accident, we____the work to rescue those trapped in the mine.
28. You can’t complain of being lonely____you don’t make any effort to communicate with others.
27. The boy was busy doing his homework, only_____once in a while to look out of the window.
26. You will be at a(n)_____if you have thought about the interview questions in advance in application for a job.