<p dir="ltr"><span><span>This question tests a fixed English sentence pattern to emphasize the importance of something. In this sentence pattern, the verb of the that-clause is a basic form since the verb is placed after the helping verb “should,” which is usually omitted.</span></span></p><div dir="ltr" align="left"><div><table class="classic-table"><colgroup><col></colgroup><tbody><tr style=""><td><p dir="ltr"><span><span>It is </span><span>important/ crucial/ essential/ vital/ significant/ necessary/ imperative/ urgent/ fundamental</span><span> that S + (should) + the basic form of a verb. </span></span></p></td></tr></tbody></table></div></div><p><br></p><p dir="ltr"><span><span>Therefore, the correct answer is Choice (C) </span><span>write</span><span>, the basic form of “write.”</span></span></p>