Do you think it wise for Chinese mothers to try to do everything for their children? —No, that’s　　　they are mistaken.

With the development of high technology, more and more new things ______ in the past years

Professor Smith, some students want to have a talk with you. ___ they wait here or outside?— Show them in now, please.

Mymathteacher________me,becausehe________Ifailedmytest.

Bob failed in the exam again . —— He _____ it ; he never worked hard .