We've already learned that a verb like to look can mean both looking with your eyes, and appearing a certain way. This seems obvious, but it is very important when considering adjectives and adverbs.
Verbs that describe the use of one of your senses (looking, feeling) are unsurprisingly called sense verbs. These verbs may be coupled with adverbs, but never adjectives.
Linking verbs, meanwhile, are verbs that can be replaced with a form of the verb to be. Examples include to seem, to appear, to remain, but also to look, to feel, and more.
As you can see, certain words can either be linking or sense verbs. Because of this, it is always important to look at the function of the verb, and what it does in the sentence. Does it describe an action? Then it's likely a sense verb, meaning an adverb is needed. If it can be replaced with to be, it's almost always a linking verb, so it can be followed by an adjective.
With the above information under your belt, you should be ready to take on the test. If you're not sure or don't feel too confident, feel free to review the material. Or, if you're ready for the test, navigate to the Test button in the menu.