新概念英语（1-31）Where's Sally?
Is the cat climbing the tree ?
A:Where is Sally, Jack ?
B:She is in the garden, Jean.
A:What's she doing?
B:She's sitting under the tree.
A:Is Tim in the garden too ?
B:Yes he is.
He is climbing the tree.
A:I beg your pardon?
B:Who is climbing the tree?
A:Tim is.
B:What about the dog?
A:The dog is in the garden, too.
B:It's running across the grass.
It's running after a cat.