If he___( to polute) water, he___(to do harm) to the environment.
If Bob and Bill____(to clean up) after picnics together with their friends, Ann____(to invite) them to the party next Friday.
Kate ____(to meet) you, if you____(to be) here tomorrow.
They_____(to visit) the London Eye if she____(to come) to London next week.
You_____( to be) healthy if you____(not to eat) junk food.
They ____(to pass) the exam if they_____(to work) hard.
Our streets______ (to be clean) if you_____( not to litter).
I____( not to buy) a souvenir if the shop_____(to be) closed next Wednesday.
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