I had _________ entered the classroom when I noticed the headmaster was sitting at the back

Jane likes collecting stamps very much. In fact, her interest in it ___back to her school days.

Tina, we are moving this weekend.—Well, I ____you to have a happy new life!

Only in this way will you get your valuable ideas __________ ; or your time will be wasted

It is the superior intelligence and the use of language that distinguish man ________ the other animals