—What did the teacher say?—The teacher told us at the Capital Museum on time.
-- You look_____. Why? --I lost my ID card.
I met Li Lei_____ hospital last Sunday. He was ill_____ hospital then.
The earth will become worse and worse ________ we do something to stop her from being polluted.
I _______ riding my bike________ taking buses to school.
— Can you come and play football with me?—______. I have a lot of homework to do.