Some insects _______ the colour of their surroundings to protect themselves.
I can guess you___________ your sweater inside out.
It is only when you nearly lose someone ____________ you fully realize how much you value him.
--I'm going downtown.--Come on.
--Shall Mary come and play computer games?--No,__________ she has finished her homework.
--I'm sorry, I shouldn't have been so rude to you.--You___________ your temper but that's OK.