—Have you seen the film______? --- Yes, I saw it three years_______>A. before, ago B. ago, before C. ago, ago
I ______ ride a bike to school. But this morning I took a taxi because I got up late.
Twenty percent of the water ______ from the underground(地下).
—Who helped you clean the classroom yesterday?—_______. I did it all by myself.
What fine weather it was! We decided _______.
He can’t go to work today________ his illness(病).