1.Was it at ten last night _____ you arrived home?A.that B.w

1.Was it at ten last night _____ you arrived home?A.that B.which C.when D.where
2.The old man is ____ thankful that he almost comes to tears.A.such B.so C.very D.as 3.I saw Mary _____ a green dress at the meeting.A.dressed B.put on C.wearing D.wear4.Could you tell us ____ from?A .where are you B.where you are C.where were you D.where did you come