Who is that beautiful woman? -- Mrs Li. She teaches _____ English very well. She always makes her classes______.
The rivers will become dirtier and dirtier ______ we take action to protect them.
-- Have you finished reading your book yet? --- No, I’ll finish it in _____ ten minutes.
Not only Linda but also I _______ out of breath at the end of the race.
_______ no one agreed with him, ______ he insisted on learning play the piano.
There _____ lots of bad information which is not ____ for teenagers on the Internet.