The student went through the paper, finding some mistakes that might         have been ignored．

It is good for elderly people to be _________ involved in community service.

30．---- Do you think it's a good idea to make friends with your students?---- _____ , I do. I think it's a great idea.

—Have you finished your project, Alice? —I’m afraid I       forgot about it.

(2013·大连24中模拟)Good health is the basis for students to ________ carry on with their studies and to do any other activity.