---- How does Tom go to school every day?---- He lives the ______ from school, so he takes the underground.
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.
Even if we are very busy, we should spend ______ doing exercise every day.
—Is your father a teacher? —Well, he _______.