________ more energy to my study instead of being crazy about Internet games, I would be sitting in a comfortable office now.

—Did you pass the driving test?—No.I ________ it，but I had little time practising.

 Mr. Li, a man calling himself Smith wants to see you. ________ he come in?

—What happened to the young trees we planted last week?—The trees ____ well, but I didn’t water them.

This cake is very sweet. You _____ a lot of sugar in it.