Aplicația este accesibilă de pe ecrane late

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1. You must turn off the water ____________ you finish washing your hands.
because
if
when
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2. We recycle ______________ we want to use old materials again.
because
if
when
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3. ___________ we plant trees, the air gets cleaner.
because
if
when
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4. _____________ we see rubbish outside the litter bin, we pick it up.
because
if
when
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5. It is harmful ________________ we throw plastic in the ocean.
because
if
when
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6. We must help animals and birds ________________ we love nature.
because
if
when