In this part, there are gaps but no alternatives are given. You have to find a word that (a) fits grammatically (b) makes sense. In making your choice of the word to go in the gap, check first that it makes sense; and secondly that it is grammatically correct.
Note that, although the examiners try to make sure that there is only one possibility, there may sometimes be more than one solution.
Many of the words tested are 'structural' words like auxiliary verbs, modals, articles and prepositions.
This is also the place where 'collocations' are tested, that is, fixed expressions such as make fun of, fall in love with, by means of, look down on.