He was driving home on the highway last night when he was stopped by a policeman, _____.

Last night I____ a book at home.

The girl in the classroom_____ be Mary. She called me from Beijing just now.

Nothing is so easy as ________ parents to raise their expectations of their children too high.[ ]

eyes of a policeman, it’s a usually very dangerous to get close to the _____criminal. He may do anything he would to escape.