.............. we don't turn off the tap when we brush teeth we waste a lot of water.
If we drop litter everywhere we go, our streets ........... dirty.
If people ............ burning fossil fuels, they ........... global warming
If I (need) _______ some medicine, I (go) _______ to the chemist's.
If Steve and Lilly (be) _______ late, we (not wait) _______ for them.
Jenna (get) _______ angry if her little sister (not behave) _______ well.
If little Tommy (fall) _______ off his bike, he (scream) _______ a lot.
Our dog (not make) _______ any noise if we (feed) _______ it on time.
We (not see) _______ each other if we (not have) _______ any free time.
If children (play) _______ outside, they (not get) _______ overweight.
I (feel) _______ sick if I (eat) _______ too much chocolate.
If Andy (go) _______ to bed late, he cannot (wake up) _______ early.
You (need) _______ to take my sister to the hospital if she (drink) _______ milk as she is allergic to it.
If you (mix) _______ water and electricity, you (get) _______ a shock.
He ... depressed if he fails the exam.
If we ... papers we ... many trees.
If she ... out tonight, she ... to the cinema.
3. Complete the sentence:
If it _______ (rain), I will take an umbrella.
If my brother (to be) in trouble, I'll help him, of course.
More animals....if we...nature.
If you... litter, you ... save our Planet.
When the Sun ...., it .... light.
The ground...wet when it......
If we....after picnics, we... land pollution.
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