It is generally considered unwise to give a child ________ he or she wants.
------Excuse me, Sir , shall all the students repeat the exam. ------________. Only those who failed.
------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.