The teacher has been trying to hammer in the facts.（英译中)

A．Leaving it alone.B．Sitting down.C．Trying to find an answerD．Asking the teacher.

The Roll-call system has been commonly adopted by college teachers to check students atten

The teacher tried to make the new student feel______.A．with easeB．at leisureC．at easeD．at

Whenever he has trouble in study, he always tries, _____, to get help from his teacher

Every means _______ been tried to solve the diffi

Instead of______ the teachers to offer them help the students tried to work it out themse