There were few doctors, _____ he had to work very hard _____ his own.
---The students sitting at the back can’t see the blackboard________. ---Why not_________ them move a little forward?
Ann was ____ a good mood and kept ____ jokes to us.
________good advice! It’s so helpful to us.
—Mary was heard_______ just now. What happened? —John was telling a joke.
It is silly ______ you to give up ______ to America for further study.