--- What did the teacher say to you?--- I left my homework at home, so she asked me when ________ it.
What do you usually doweekends?
—Hi. _______________. ----Yes. It’s been a long time.
Tom ______ watch TV after supper _____ last night.
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).