During the period of recent terrorist activities, people _____ not to touch an unattended bag.
My friend said that she would like _______ out with me, but I didn’t feel like _______ anything that day.
I would appreciate _____ , to be frank, if you can take care of my pet dog.
I recognized him_________ I saw him in the crowd.
Had I known her name,I________.
Every year _____ money and energy is spent on environment protection.