<ol>
<li>(If there had been) a power failure, the hospital will run on electricity from its own generators which can operate for 200 hours.
A If there had been
B If there were
C Had there been
D Should there be
E There has been</li>
</ol>
<p>I picked B, because it sounded really nice. But the correct answer is D.</p>
<ol>
<li>Linking the sides of the gorge (was) a suspension bridge (built) a hundred years (earlier) by local farmers seeking to expedite travel between their fields (to) the marketplace.</li>
</ol>
<p>It's (to). OKAY WHAT IS WRONG WITH 'TO'? o_o</p>
<p>For 24 …
… between requires “and”
Examples: pick a number between one and ten; choose between vanilla and strawberry; bike between A and B.</p>
<p>For 23
… look at the tense regarding the hospital – i.e. “the hospital will run”. The event hasn’t yet happened. That eliminates all choices but D. You can approach this in a more analytic way … i.e. hypothetical event etc. Here too because of the “should” you get D.</p>
<p>But I don’t get Number 24. Okay so it’s from here TO there. I thought they were transporting something from this place TO that place?</p>
<p>And 5’s explanation was great. Thank you!</p>
<p>Yes … if it were “from” than the “to” would be correct. But it’s “between”, so you need the “and”.</p>
<p>The construction is: blah blah between…and…blah blah.</p>