While Helen ________ the piano，her mother came in．

Time goes by so fast . We must never miss the chance to show love for our parents and make them _____ how much they mean to us .

Where have you___________, Mike? I have　____________ to the library with my friends.

Is this a photo of your daughter? She looks ____ in the pink dress!

Why was __ you lost all your keys？—It was because of my carelessness.