In recent days ,with the help of our teacher , I have made ___ great progress in _____mathematics.
39.Since she was badly ill, her friend visited her ___.
There are ___ kinds of reference books in the library.
The skirt is too large for me.Would you show me ___ one ?
The children are giving their classroom a good cleaning, ___ are sweeping; ___ are mopping.
Tom,Bob and Betty have arrived, but ___ students haven’t yet.