| A | B |
| essential | necessary |
| jeopardize | endanger;ruin |
| on hand | readily available |
| devise | invent |
| walk through | rehearse; practice |
| back-up plan | an extra plan |
| implement | start using(a plan) |
| warning system | a system that gives advance notice about possible danger |
| get through | make a telephone connection with someone |
| evacuation | the process of making people leave an unsafe place |
| take into consideration | think about |
| extent | size or amount |
| evaluate | study the facts |
| in-depth | detailed |
| hazard | something that is dangerous |
| eligible | available for dating |
| bachelor | a single man |
| compatible | having similar tastes or interests |
| uninhibeted | free in behavior |
| reluctant | hesitant |
| call the shots | control the situation |
| cheat on | secretly have a relationship with someone |
| ideal | perfect |
| chemistry | the way two people relate to each other |
| go over well | well received by another person |
| hit it off | meet for the first time and immediately like each other |
| dump | to finish a relationship with a date |
| fall head over heels | fall in love completely |