John and I___friends for eight years.We first got to know each other at a Christmas party.But we_____ each other a couple of times before that.
—Why did Sarah cry just now? — She wanted a toy, _____ I can’t afford.
You’d better keep ______ when I take photos for you.
I can’t afford _______ car.
He is known _____ a scientist and famous _____ his research on rice.
I live at a busy street and the loud noise nearly ____me mad.