The river _____ banks used to be covered with fruit trees and flowers is now seriously polluted.
--- What’s Joan doing? --- _________ newspapers in the room.
--- Mary didn’t attend the lecture, did she? --- Yes, she ________.
--- Will you waste your time and money on that? --- Certainly ________.
Although ________ to stop, he kept on working.
He said _____ his sister had passed the college entrance examination, and _____ she would go to college in about 20 days.