---How did your students express their thanks to you on Teachers’ Day?---A gift together with many flowers _______ sent to me .
------Make sure you have turned off the air conditioners before going out. ------________________.
He was about to tell me the secret __ someone patted him on the shoulder.
He is the only one of the students who __ a winner of three years.
The scientist did __ experiments to test the new drug.
These plants are watered __ .