In the below question, a sentence is given with one or two parts bracketed. Select the option that provides the correct replacement for the bracketed part(s). In case of no improvement needed, choose 'No Improvement' option.
One or two others here at the hospital have been helping me especially Morrison, and we've completed (a number of) fairly successful trials with laboratory animals.
1
No Improvement
2
many of
3
much of
4
a several of