1. LOOK THE SENTECE AND CHOOSE THE CORRECT FORM OF FIRST CONDITIONAL: If you don't pay attention, you _________________________(not/ understand) it.

a) If you don't pay attention, you not understand it.

b) If you don't pay attention, you understand it.

c) If you don't pay attention, you will not understand it.

d) If you don't pay attention, you not will it.