—Learning to love is like learning to walk.
—Yes, ________ we step out bravely, we can find it easy.
although
when
unless
Please_________ before 9 o’clock.
My home isn’t far ______my school, so I often walk to school.
Mr. Green ______ goes shopping, because he is ______ busy working.
--- ________ do you go to school every day? --- ________ .
The man ______ a blue coat is standing _______ my father.