—Could you tell me______ at this time yesterday?—Oh, I was watching TV.A.when you were goingB.where you were goingC.what you were doing
Smile to the world, _____ the world will smile back to you.
–I called you yesterday afternoon, but you were not at home.--Sorry, I _________ some shopping with my mother then .
The mobile phone has influenced people’s life a lot since it _______.
. –Mary, is this ______ umbrella?--No, it’s not mine. It is _______.
The tall building has ______ floors. And Tony lives on the ______ floor.