Grammar Questions!

<ol>
<li>Digital technology, as every marketer knows, is synonymous to speed, precision and the future. </li>
</ol>

<p>My Answer: To
Correct Answer: With</p>

<p>Is the correct idiom “synonymous witth”? </p>

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<ol>
<li>Venezuela devotes a higher percantage of its budget to education than do other large Latin American countries such as Mexico and Brazil. </li>
</ol>

<p>My Answer: than do
Correct Answer: No Error</p>

<p>Why is there no error in this sentence? I thought that “than do” should be “than does”. </p>

<hr>

<ol>
<li>Unlike the hollow body of an acoustic guitar, which acts as a sound box to project sound, the solid-body electric guitar is almost soundless without the aid of an amplification system. </li>
</ol>

<p>My Answer: (original) the hollow body of an acoustic guitar, which acts
Correct Answer: an acoustic guitar, whose hollow body acts</p>

<p>Why is my answer wrong?</p>

<p>The idiom has always been synomonous with. In second one, do could go where it is or after countries but is needed because if left out sentence would be saying that Venazuela devotes part of its budget to other countries. Three as originally written is confusing because you cannot tell whether the which phrase refers to hollow body or generally to the acoustic guitar and to be accurate sentence has to be corrected to clarify that the which phrase is referring to the effect of the hollow body.</p>

<h1>2, country–> DOES</h1>

<p>but countries–> DO
subject of the verb in question is COUNTRIES not VENEZUELA</p>

<h1>3, unparallel comparison. you compare an acoustic guitar to an electric guitar. you do not compare THE HOLLOW BODY of an acoustic guitar to an electric guitar.</h1>