Put the verbs in brackets into either "the present simple", "the future simple" or "the imperative". 

example: if you (walk)…under a ladder, it (bring)… 

bad luck. 

if you walk under a ladder, it brings bad luck. if you walk under a ladder, it will bring bad luck. 

1. if it (be)… 

foggy this evening, i (stay)… 

at home. 

2. if we (take) 

care of the environment, our children (have) 

a better future. 

3. if you (eat) 

so much carbohydrate, you (put on) … … 

weight. 

4. if we (plant) 

more trees, our children (have)… 

a better environment. 

5. if i (get)… 

a bad headache, i (take)… 

one of these tablets.