Helen is ______ office worker in a big company near Xinjiekou.
—Dad, do I need to bring a raincoat with me ?—I’m afraid you .
—Did you see him yesterday?—No, when I got to the airport, he a taxi for home.
The old scientist devoted most of his time ___________ the space science.
_________good advice! It’s so helpful to us.
—Mary was heard_______ just now. What happened?—John was telling a joke.