Writing help

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1

<ol>
<li>Because neither of the dolls [were] in its original box, the pair [would not be] worth [as much as] the toy collector [had] hoped. No error</li>
</ol>

<p>Why is the error "were"?
I put no error.</p>

<ol>
<li>New Zealand [had fostered] a thriving local music scene [for decades], but it was not until the late 1980s [when] New Zealand musicians began [to reach] international audiences. No error</li>
</ol>

<p>Why is it when?</p>

2

<p>1.neither is a indefinite pronoun that takes on singular verb.</p>

<p>2.when—>that, the idea in this sentence is not complete.when is not correctly used here.</p>