-- _____is that used for?---_____ the floor.
They said to us, “Are you afraid to leave this house ?” They asked us ____ afraid to leave _____ house.
The number of people in their class _______51.
It was in New Zealand ______ Elizabeth first met Mr.Smith.
Autumn coming, the leaves have ________turned into brown color.
catch the first bus, he got up very early this morning.