Dear Friends,
Here is a detailed explanation to thisquestion-
Here is a detailed explanation to thisquestion-
inakihernandez wrote:
A team of researchers reported that five endangered bird species had resumed nesting or investigated nesting boxes erected by volunteers havingbeen ferried out to the island last month.
(a) investigated nesting boxes erected by volunteers having been
(b) begun investigating nesting boxes erected by volunteers, being
(c) investigating nesting boxes, erected by volunteers,
(d) were investigating nesting boxes erected
...
(a) investigated nesting boxes erected by volunteers having been
(b) begun investigating nesting boxes erected by volunteers, being
(c) investigating nesting boxes, erected by volunteers,
(d) were investigating nesting boxes erected
...
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