---- Is there a vaccine _____ pig influenza?, I’m anxious to know. ----- Don’t worry, there is a vaccine _____ for pigs against pig influenza
He raised his voice to make himself _______ clearly by the audience.
There were too many people in the room and he could hardly find a chair ______.
Rather than ______ on a crowded bus, he always prefers ______ a bicycle.
They hurried to the station only _______ that the train had left.
The president is reported _______ that country last week.