He's unhappy at the sad news,_____?

He's unhappy at the sad news,_____?
A.isn't he B.is he
Mrs Li was very angry_____her son____his words.
A.with,with B.with,at C.with,to
My room is________my sister's.
A,three times as big as B.as three times big as
The water in this bottle is colder than____.
A.that bottle B.in that bottle C.the water in that bottle
D.that in that bottle
The family___at the lunch table when someone came to tell them what had happened at___.
A.were sitting,Mr Brown B.were sitting,Mr Brown's
C.was sitting,Mr Brown D.was sitting,Mr Brown's
The number of people who____cars of their own increasing.
A.has B,have