.................his T-shirt?
Is this his T-shirt? Yes, it is.
....................his trousers?
Are these his trousers? Yes, they are.
.......her trousers?
Are these her trousers? No, they aren't.
...........her socks?
Are these her socks? No, they aren't.
...............her shoes?
Are these her shoes? Yes, they are.
...............his dress?
Is this his dress? No, it isn't.
............his hat?
Is this his hat? No, it isn't.