TOEIC Reading 5 Exercisee 434

<p dir="ltr"><span><span>The blank follows the verb “forget,” and is followed by a noun clause “which version of the software is installed.” In other words, the blank should be filled with a form of a verb that can be used as the object of the verb “forget” and also explain what to do with the version of the software.&nbsp;</span></span></p><p>In general, the forms of a verb that can be used as the object of another verb are either gerunds or to-infinitives. Thus, only (B) "specifying" and (D)&nbsp;"to specify" are possible answers.&nbsp;<br></p><p>The key to identifying the correct answer is to tell whether the users should not forget specifying something or users should not forget to specify something. If a person forgets doing something, that means he or she has done something, but they just forget that they have done it. If a person forgets to do something, that means he or she hasn’t done it yet, and they forget that they should do it.&nbsp;</p><p dir="ltr"><span><span>Based on the meaning of the context, the users are recommended to remember to specify which version of the software is installed, but they haven’t done it yet when this recommendation is made. Thus, the correct answer is (D) "</span><span>to specify".&nbsp;</span></span></p>