What's Miss Zhang doing?
She's making a card forher teacher, Mr. Wang.

What was Mr Wang like then?
He was young.He was strong-His hair was black.

Was是is的过去式。表示过去发生的动作。
常与then（那个时候)连用。

Who's this little girl?
What was she like?(她是什么样子的?)She's Miss Zhang. She was nine then.She was short and thin.