DmitryFarber
2) We can also use a new verb to shift tense, as in D ("had resumed . . . or were investigating"). It's perfectly valid to shift tense if the meaning makes sense. Here, the meaning is that all of the five species either had already resumed nesting or were currently investigating the new boxes.
I had difficulty in understanding the meaning of correct option choice D.
birds species had resumed nesting .. Past Perfect
or
birds species were investigating nesting boxes
...
DmitryFarber wrote:
2) We can also use a new verb to shift tense, as in D ("had resumed . . . or were investigating"). It's perfectly valid to shift tense if the meaning makes sense. Here, the meaning is that all of the five species either had already resumed nesting or were currently investigating the new boxes.
I had difficulty in understanding the meaning of correct option choice D.
birds species had resumed nesting .. Past Perfect
or
birds species were investigating nesting boxes
...
