31. I still remember ______ to the hospital, supported by my class teacher when I was ill at school.
There has been a great increase in retail sales , ____﹖
You ____ him so closely; you should have kept your distance.
In fact Peter would rather have left for San Francisco than ____ in New York..
Professor Wang , _______ for his informative lectures, was warmly received by his students.
________evidence that language acquiring ability must be stimulated.