In part 1 of the Reading and Use of English paper of the B2 First exam, you'll be given a text with blanks. You have to select the most appropriate option to complete the phrase.

There are 8 gaps (plus one gap as an example).  Each gap represents a missing word or phrase.  You have to choose which one of the four words or phrases fills the gap correctly. 

Shade in the corresponding block on the answer sheet, as shown in the example shown below.