A: ----Was it Sam’s schoolbag? B:---- A.Yes, it is. B.No, it was. C. Yes,it was.
( )—_______ hehis lunch? 一Yes, he did.
( )—What _______ you _______ last week? —I bought a bag.
( ) He went into the room and _______ the door.
( ) What did you see _______?
( ) _______ you _______ at six o’clock yesterday?