请按照例句帮我把这四个英语题的答案写一下，谢谢。是新概念青少版1A的LESSON13课后对话练习2，急！～

1.A:Is blue pen mum's favorite one?
B:No,it isn't.
A:Which is mum's favorite one?
B:The red one.
2.A:Is mum's new ruler on the desk?
B:No,it isn't.
A:Where is mum's new reler?
B:It's under the chair.
3.A:Is this Lucy's pencil-case?
B:No,it isn't.
A:Whose pencil-case?
B:Mary's.
4.A:Is pencil-case dad's favorite thing?
B:No,it isn't.
A:Which is dad's favorite thing?
B:It's pen.

1
Is blue pen Mum's favourite one?
No,it isn't.
Which pen is Mum's favourite one?
The blue pen is Mum's favourite one.
2
Is Mum's new ruler on the desk?
No,it isn't.
Where is Mum's new ruler?
It's on the desk.
3
Is pencil-case Lucy's?
No,it isn't.
Whose pencil-case is it?
It's Lucy's
4
Is pencil-case Dad's favourite thing?
No,it isn't.
What is Dad's favourite thing?
The pencil-case is Dad's favourite thing.

以后尽量自己做，再参考其他答案。祝进步！

1. is the blue pen mum's favorite one?
no, it isn't.
which is mum's favorite pen?
mum's favorite pen is the red one.
2. is mum's new ruler on the desk?
no, it isn't
where is mum's new ruler?
it is in lucy's schoolbag
3. is this pencil-case lucy's
no, it isn't.
whose pencil-case is it?
it is lily's
4. is the pencil-case Dad's favorite thing?
no, it isn't
what is dad's favorite thing?
dad's favorite thins is the ruler

1 blue pen / Mum's favourite one?(which...?)
A:Is blue pen Mum's favourite one?
B:No,it isn't.
A:Which is Mum's favourite one?
B:It is black pen.
2 Mum's new ruler / on the desk?(Where...?)
A:Is Mum's new ruler on the desk?
B:No,it isn't.
A:Where is Mum's new ruler ?
B:It is under the desk.
3 pencil-case / Lucy's?(Whose...?)
A:Is pencil-case Lucy's?
B:No,it isn't.
A:Whose pencil-case it is?
B:It is Lily's.
4 pencil-case / Dad's favourite thing?(What...?)
A:Is pencil-case Dad's favourite thing ?
B:No,it isn't.
A:What is Dad's favourite thing?
B:It is pen.

1.A: Is blue pen Mum's favorite one?
B: No,it isn't.
A: Which is Mum's favorate pen?
B: The black pen.
2.A: Is Mum's new ruler on the desk?
B: No, it isn't.
A: Where is Mum's new ruler?
B: It's in Lily's schoolbag.
3.A：Is this pencil-case Lucy's?
B: No, it isn't.
A: Whose pencil-case it is?
B: It is Lily's.
4.A: Is pencil-case Dad's favorite thing ?
B: No, it isn't.
A: What is Dad's favorite thing?
B：Pen is Dad's favorite thing.