The policeman________the children to cross the road when the traffic lights turned green. [ ]

How did your students express their thanks to you on Teachers’ Day? — A gift, together with many flowers ______ sent to me by my students

Smoking is not _____ in the meeting hall.

_______ from his family for over two years, he is now eager to go back home.

The book was written in1946, the education system has witnessed great changes[ ]