John, _______ university professor, is considered to be _______ success as ______ expert in the agriculture research.
Mrs. Brown helps me out when I have too much work to do, and I return her _______whenever I can.
This kind of cloth _______ well. I think it is worth _______.
-- I’d like some more cheese. --Sorry, there’s ______ left.
The accident happened on such an evening with strong winds ________ by heavy rain.
The moment the World Expo ________ open, the whole audience cheered.