I can’t say a thank you ________ much. I couldn’t havesucceeded without your help.

Where’s that report?—I brought it to you __________ you were in Mr. Black’s office yesterday.

She had just finished her homework ______ her mother asked her to practise playing the piano yesterday

I felt _____ to see her _____ face.

–I believe that more effective measures have to be taken before we can breathe cleaner air.–______. Air pollution has become too serious a problem.