选用下面的句子完成对话。

A．Is it spring?

B．What is that in your hand?

C．It looks so nice.

D．Yes, it is.

E．What’s he doing?

A: Hi, Wu Yifan. Wait for me.
B: OK, hurry up.
A: ________
B: It’s a picture of my garden.
A: Really? Is it big?
B: ________ Look! We grow many flowers and trees in it.
A: ________
B: Yes, the flowers comes out and trees are green.
A: ________ Who’s the boy?
B: He’s my cousin.
A: ________
B: He is flying a kite.
A: I want to visit your garden some day.

—Is Jack there? ( )
—Sorry, he is ______ .

A．home

B．here

C．out

— ______ book is this? (    )
—It is my book.

A．Who

B．What

C．When

D．Whose

—_______ play hide-and-seek. (   )
—OK.

A．Let is

B．Let

C．Let's

—What’s her name? (   )
—______ name is Sarah.

A．She

B．Her

C．His