英语 根据句意以及括号内所给词的提示填空

英语 根据句意以及括号内所给词的提示填空
请告诉我为什么该这么填,
1、___（she)name isn′t Mary.
2、___(I)am Jack.What′s your name?
3、Look!___(you)sister is there.
4、----How are _____(you)
----Fine,thanks.
5、----What color is_____(he)clock?
----Blue
6、My name is Tom.I____(be) a boy.
7、_____(be)you Mary.and Linda?
8、The blue clock_____(be)nice.
9、"I"____(be)the ninth letter in the Alphabet.
10、My name is Linda Hand.Linda is my ____(one)name.